/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:34:18,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:34:18,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:34:19,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:34:19,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 22:34:19,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:34:19,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:34:19,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:34:19,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:34:19,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:34:19,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:34:19,158 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:34:19,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:34:19,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:34:19,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:34:19,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:34:19,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:34:19,160 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:34:19,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:34:19,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:34:19,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:34:19,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:34:19,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:34:19,162 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:34:19,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:34:19,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:34:19,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:34:19,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:34:19,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:34:19,475 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:34:19,476 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:34:19,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl [2021-06-12 22:34:19,477 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy11.wvr.bpl' [2021-06-12 22:34:19,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:34:19,502 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:34:19,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:34:19,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:34:19,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:34:19,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,518 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:34:19,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:34:19,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:34:19,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:34:19,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... [2021-06-12 22:34:19,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:34:19,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:34:19,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:34:19,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:34:19,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:34:19,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:34:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:34:19,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:34:19,619 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:34:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:34:19,619 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:34:19,620 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:34:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:34:19,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:34:19,621 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:34:19,740 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:34:19,740 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:34:19,742 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:34:19 BoogieIcfgContainer [2021-06-12 22:34:19,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:34:19,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:34:19,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:34:19,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:34:19,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:34:19" (1/2) ... [2021-06-12 22:34:19,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad1668e and model type easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:34:19, skipping insertion in model container [2021-06-12 22:34:19,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:34:19" (2/2) ... [2021-06-12 22:34:19,748 INFO L111 eAbstractionObserver]: Analyzing ICFG easy11.wvr.bpl [2021-06-12 22:34:19,752 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:34:19,753 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:34:19,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:34:19,754 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:34:19,771 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,771 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,771 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,772 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,772 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,772 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,772 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,772 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,773 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,773 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,773 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,773 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,774 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,774 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,774 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,775 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,776 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,776 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,776 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,776 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,778 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,781 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 22:34:19,786 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 22:34:19,803 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 22:34:19,820 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:34:19,820 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:34:19,820 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:34:19,820 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:34:19,820 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:34:19,820 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:34:19,820 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:34:19,821 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:34:19,828 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-12 22:34:19,839 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:19,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:19,847 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:19,847 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:19,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1728152339, now seen corresponding path program 1 times [2021-06-12 22:34:19,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:19,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152281425] [2021-06-12 22:34:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:20,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:20,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152281425] [2021-06-12 22:34:20,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152281425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:20,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:20,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:20,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408652916] [2021-06-12 22:34:20,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:20,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:20,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:20,169 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:20,440 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-06-12 22:34:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:20,450 INFO L225 Difference]: With dead ends: 98 [2021-06-12 22:34:20,450 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:20,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2021-06-12 22:34:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-12 22:34:20,506 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 15 [2021-06-12 22:34:20,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:20,507 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-12 22:34:20,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-12 22:34:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:20,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:20,508 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:20,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:34:20,509 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2019667169, now seen corresponding path program 2 times [2021-06-12 22:34:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:20,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291429723] [2021-06-12 22:34:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:20,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:20,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291429723] [2021-06-12 22:34:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291429723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:20,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070321303] [2021-06-12 22:34:20,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:20,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:20,693 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:20,898 INFO L93 Difference]: Finished difference Result 98 states and 190 transitions. [2021-06-12 22:34:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:20,903 INFO L225 Difference]: With dead ends: 98 [2021-06-12 22:34:20,903 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:20,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-06-12 22:34:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 65 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 127 transitions. [2021-06-12 22:34:20,924 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 127 transitions. Word has length 15 [2021-06-12 22:34:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:20,925 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 127 transitions. [2021-06-12 22:34:20,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 127 transitions. [2021-06-12 22:34:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:20,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:20,927 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:20,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:34:20,928 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash 949033841, now seen corresponding path program 3 times [2021-06-12 22:34:20,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:20,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493051643] [2021-06-12 22:34:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:21,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:21,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493051643] [2021-06-12 22:34:21,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493051643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:21,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:21,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:21,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911330971] [2021-06-12 22:34:21,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:21,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:21,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:21,074 INFO L87 Difference]: Start difference. First operand 66 states and 127 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:21,246 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2021-06-12 22:34:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:21,247 INFO L225 Difference]: With dead ends: 89 [2021-06-12 22:34:21,247 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 22:34:21,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 22:34:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2021-06-12 22:34:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 128 transitions. [2021-06-12 22:34:21,253 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 128 transitions. Word has length 15 [2021-06-12 22:34:21,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:21,253 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 128 transitions. [2021-06-12 22:34:21,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,253 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 128 transitions. [2021-06-12 22:34:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:21,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:21,254 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:21,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:34:21,254 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1619078043, now seen corresponding path program 4 times [2021-06-12 22:34:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:21,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651436605] [2021-06-12 22:34:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:21,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:21,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651436605] [2021-06-12 22:34:21,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651436605] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:21,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:21,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070215445] [2021-06-12 22:34:21,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:21,352 INFO L87 Difference]: Start difference. First operand 67 states and 128 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:21,484 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-06-12 22:34:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:21,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:21,485 INFO L225 Difference]: With dead ends: 88 [2021-06-12 22:34:21,485 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 22:34:21,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 22:34:21,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2021-06-12 22:34:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-06-12 22:34:21,490 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 15 [2021-06-12 22:34:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:21,490 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-06-12 22:34:21,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-06-12 22:34:21,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:21,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:21,491 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:21,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 22:34:21,491 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:21,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:21,492 INFO L82 PathProgramCache]: Analyzing trace with hash 168516007, now seen corresponding path program 5 times [2021-06-12 22:34:21,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:21,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624807086] [2021-06-12 22:34:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:21,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:21,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624807086] [2021-06-12 22:34:21,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624807086] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:21,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:21,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:21,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686329387] [2021-06-12 22:34:21,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:21,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:21,565 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:21,724 INFO L93 Difference]: Finished difference Result 106 states and 211 transitions. [2021-06-12 22:34:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:21,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:21,726 INFO L225 Difference]: With dead ends: 106 [2021-06-12 22:34:21,726 INFO L226 Difference]: Without dead ends: 96 [2021-06-12 22:34:21,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-12 22:34:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-06-12 22:34:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2021-06-12 22:34:21,734 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2021-06-12 22:34:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:21,736 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2021-06-12 22:34:21,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2021-06-12 22:34:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:21,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:21,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:21,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 22:34:21,738 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:21,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1157750279, now seen corresponding path program 6 times [2021-06-12 22:34:21,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:21,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164885638] [2021-06-12 22:34:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:21,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:21,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164885638] [2021-06-12 22:34:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164885638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:21,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:21,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449067477] [2021-06-12 22:34:21,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:21,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:21,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:21,848 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:22,037 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-12 22:34:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:22,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:22,038 INFO L225 Difference]: With dead ends: 98 [2021-06-12 22:34:22,038 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:22,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:22,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-06-12 22:34:22,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-12 22:34:22,042 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-12 22:34:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:22,042 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-12 22:34:22,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-12 22:34:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:22,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:22,043 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:22,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 22:34:22,043 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash -487706077, now seen corresponding path program 7 times [2021-06-12 22:34:22,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:22,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326162676] [2021-06-12 22:34:22,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:22,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:22,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326162676] [2021-06-12 22:34:22,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326162676] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:22,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:22,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308963644] [2021-06-12 22:34:22,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:22,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:22,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:22,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:22,155 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:22,321 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-12 22:34:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:22,322 INFO L225 Difference]: With dead ends: 97 [2021-06-12 22:34:22,322 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 22:34:22,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 22:34:22,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-06-12 22:34:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-12 22:34:22,327 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2021-06-12 22:34:22,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:22,327 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-12 22:34:22,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,327 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-12 22:34:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:22,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:22,328 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:22,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 22:34:22,328 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash -82039123, now seen corresponding path program 8 times [2021-06-12 22:34:22,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:22,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824211091] [2021-06-12 22:34:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:22,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:22,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824211091] [2021-06-12 22:34:22,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824211091] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:22,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:22,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425159680] [2021-06-12 22:34:22,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:22,407 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:22,543 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-12 22:34:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:22,544 INFO L225 Difference]: With dead ends: 95 [2021-06-12 22:34:22,544 INFO L226 Difference]: Without dead ends: 85 [2021-06-12 22:34:22,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-12 22:34:22,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2021-06-12 22:34:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-12 22:34:22,548 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 15 [2021-06-12 22:34:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:22,548 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-12 22:34:22,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-12 22:34:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:22,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:22,549 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:22,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 22:34:22,549 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash 588005079, now seen corresponding path program 9 times [2021-06-12 22:34:22,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:22,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860167599] [2021-06-12 22:34:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:22,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:22,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860167599] [2021-06-12 22:34:22,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860167599] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:22,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:22,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:22,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52613656] [2021-06-12 22:34:22,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:22,619 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:22,800 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-12 22:34:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:22,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:22,802 INFO L225 Difference]: With dead ends: 94 [2021-06-12 22:34:22,802 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 22:34:22,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:22,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 22:34:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-06-12 22:34:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-12 22:34:22,805 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 15 [2021-06-12 22:34:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:22,805 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-12 22:34:22,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-12 22:34:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:22,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:22,806 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:22,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 22:34:22,806 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2044309529, now seen corresponding path program 10 times [2021-06-12 22:34:22,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:22,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446418245] [2021-06-12 22:34:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:22,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:22,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:22,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446418245] [2021-06-12 22:34:22,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446418245] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:22,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:22,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:22,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551801376] [2021-06-12 22:34:22,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:22,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:22,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:22,867 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:23,006 INFO L93 Difference]: Finished difference Result 97 states and 191 transitions. [2021-06-12 22:34:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:23,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:23,007 INFO L225 Difference]: With dead ends: 97 [2021-06-12 22:34:23,007 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:23,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:23,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-06-12 22:34:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2021-06-12 22:34:23,010 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 15 [2021-06-12 22:34:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:23,010 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2021-06-12 22:34:23,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2021-06-12 22:34:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:23,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:23,011 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:23,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 22:34:23,011 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1160181413, now seen corresponding path program 11 times [2021-06-12 22:34:23,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:23,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513261317] [2021-06-12 22:34:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:23,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:23,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513261317] [2021-06-12 22:34:23,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513261317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:23,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:23,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:23,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370614661] [2021-06-12 22:34:23,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:23,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:23,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:23,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:23,078 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:23,221 INFO L93 Difference]: Finished difference Result 110 states and 221 transitions. [2021-06-12 22:34:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:23,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:23,222 INFO L225 Difference]: With dead ends: 110 [2021-06-12 22:34:23,222 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 22:34:23,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 22:34:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-12 22:34:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-06-12 22:34:23,226 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 15 [2021-06-12 22:34:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:23,226 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-06-12 22:34:23,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-06-12 22:34:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:23,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:23,226 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:23,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 22:34:23,227 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:23,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1808519597, now seen corresponding path program 12 times [2021-06-12 22:34:23,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:23,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374354495] [2021-06-12 22:34:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:23,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:23,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374354495] [2021-06-12 22:34:23,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374354495] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:23,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:23,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:23,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480789960] [2021-06-12 22:34:23,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:23,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:23,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:23,296 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:23,440 INFO L93 Difference]: Finished difference Result 102 states and 205 transitions. [2021-06-12 22:34:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:23,441 INFO L225 Difference]: With dead ends: 102 [2021-06-12 22:34:23,441 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 22:34:23,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 22:34:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-12 22:34:23,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-12 22:34:23,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-12 22:34:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:23,444 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-12 22:34:23,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-12 22:34:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:23,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:23,445 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:23,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 22:34:23,445 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1816403497, now seen corresponding path program 13 times [2021-06-12 22:34:23,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:23,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554579728] [2021-06-12 22:34:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:23,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:23,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554579728] [2021-06-12 22:34:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554579728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:23,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:23,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:23,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548803546] [2021-06-12 22:34:23,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:23,521 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:23,677 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-12 22:34:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:23,678 INFO L225 Difference]: With dead ends: 101 [2021-06-12 22:34:23,678 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 22:34:23,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 22:34:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-12 22:34:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-12 22:34:23,681 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 15 [2021-06-12 22:34:23,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:23,681 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-12 22:34:23,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-12 22:34:23,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:23,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:23,682 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:23,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 22:34:23,682 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:23,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1410736543, now seen corresponding path program 14 times [2021-06-12 22:34:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:23,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16124493] [2021-06-12 22:34:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:23,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:23,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16124493] [2021-06-12 22:34:23,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16124493] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:23,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:23,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:23,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113167516] [2021-06-12 22:34:23,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:23,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:23,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:23,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:23,743 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:23,907 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-12 22:34:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:23,910 INFO L225 Difference]: With dead ends: 104 [2021-06-12 22:34:23,910 INFO L226 Difference]: Without dead ends: 94 [2021-06-12 22:34:23,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-12 22:34:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-12 22:34:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0) internal successors, (146), 73 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 146 transitions. [2021-06-12 22:34:23,916 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 146 transitions. Word has length 15 [2021-06-12 22:34:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:23,916 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 146 transitions. [2021-06-12 22:34:23,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:23,917 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 146 transitions. [2021-06-12 22:34:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:23,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:23,918 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:23,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 22:34:23,918 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:23,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:23,918 INFO L82 PathProgramCache]: Analyzing trace with hash -740692341, now seen corresponding path program 15 times [2021-06-12 22:34:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:23,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406700367] [2021-06-12 22:34:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:23,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:23,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406700367] [2021-06-12 22:34:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406700367] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:23,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:23,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803763425] [2021-06-12 22:34:23,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:23,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:23,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:23,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:23,981 INFO L87 Difference]: Start difference. First operand 74 states and 146 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:24,116 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-12 22:34:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:24,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:24,117 INFO L225 Difference]: With dead ends: 103 [2021-06-12 22:34:24,117 INFO L226 Difference]: Without dead ends: 93 [2021-06-12 22:34:24,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-12 22:34:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-06-12 22:34:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0) internal successors, (144), 72 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 144 transitions. [2021-06-12 22:34:24,120 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 144 transitions. Word has length 15 [2021-06-12 22:34:24,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:24,120 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 144 transitions. [2021-06-12 22:34:24,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 144 transitions. [2021-06-12 22:34:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:24,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:24,121 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:24,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 22:34:24,121 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash 921960347, now seen corresponding path program 16 times [2021-06-12 22:34:24,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:24,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489586825] [2021-06-12 22:34:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:24,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:24,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489586825] [2021-06-12 22:34:24,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489586825] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:24,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:24,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:24,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095453717] [2021-06-12 22:34:24,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:24,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:24,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:24,188 INFO L87 Difference]: Start difference. First operand 73 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:24,321 INFO L93 Difference]: Finished difference Result 106 states and 212 transitions. [2021-06-12 22:34:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:24,322 INFO L225 Difference]: With dead ends: 106 [2021-06-12 22:34:24,322 INFO L226 Difference]: Without dead ends: 97 [2021-06-12 22:34:24,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-12 22:34:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2021-06-12 22:34:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-06-12 22:34:24,325 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 15 [2021-06-12 22:34:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:24,325 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-06-12 22:34:24,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-06-12 22:34:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:24,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:24,326 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:24,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 22:34:24,326 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1329337487, now seen corresponding path program 17 times [2021-06-12 22:34:24,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:24,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643489212] [2021-06-12 22:34:24,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:24,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:24,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643489212] [2021-06-12 22:34:24,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643489212] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:24,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:24,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822511769] [2021-06-12 22:34:24,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:24,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:24,391 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:24,519 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-06-12 22:34:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:24,520 INFO L225 Difference]: With dead ends: 95 [2021-06-12 22:34:24,520 INFO L226 Difference]: Without dead ends: 85 [2021-06-12 22:34:24,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-12 22:34:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2021-06-12 22:34:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9726027397260273) internal successors, (144), 73 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 144 transitions. [2021-06-12 22:34:24,523 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 144 transitions. Word has length 15 [2021-06-12 22:34:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:24,523 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 144 transitions. [2021-06-12 22:34:24,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 144 transitions. [2021-06-12 22:34:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:24,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:24,523 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:24,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-12 22:34:24,524 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:24,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:24,524 INFO L82 PathProgramCache]: Analyzing trace with hash -659293285, now seen corresponding path program 18 times [2021-06-12 22:34:24,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:24,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307399252] [2021-06-12 22:34:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:24,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:24,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307399252] [2021-06-12 22:34:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307399252] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:24,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:24,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:24,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977270238] [2021-06-12 22:34:24,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:24,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:24,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:24,584 INFO L87 Difference]: Start difference. First operand 74 states and 144 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:24,711 INFO L93 Difference]: Finished difference Result 94 states and 183 transitions. [2021-06-12 22:34:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:24,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:24,712 INFO L225 Difference]: With dead ends: 94 [2021-06-12 22:34:24,713 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 22:34:24,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:24,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 22:34:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-06-12 22:34:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-06-12 22:34:24,721 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 15 [2021-06-12 22:34:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-06-12 22:34:24,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-06-12 22:34:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:24,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:24,722 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:24,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-12 22:34:24,722 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:24,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:24,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1003359403, now seen corresponding path program 19 times [2021-06-12 22:34:24,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:24,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757772297] [2021-06-12 22:34:24,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:24,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:24,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757772297] [2021-06-12 22:34:24,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757772297] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:24,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:24,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582436387] [2021-06-12 22:34:24,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:24,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:24,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:24,801 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:24,941 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-06-12 22:34:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:24,942 INFO L225 Difference]: With dead ends: 97 [2021-06-12 22:34:24,942 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:24,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:24,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-06-12 22:34:24,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.971830985915493) internal successors, (140), 71 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 140 transitions. [2021-06-12 22:34:24,946 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 140 transitions. Word has length 15 [2021-06-12 22:34:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:24,946 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 140 transitions. [2021-06-12 22:34:24,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:24,946 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 140 transitions. [2021-06-12 22:34:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:34:24,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:24,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:24,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-12 22:34:24,947 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:24,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:24,947 INFO L82 PathProgramCache]: Analyzing trace with hash -67100201, now seen corresponding path program 20 times [2021-06-12 22:34:24,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:24,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216910443] [2021-06-12 22:34:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:25,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216910443] [2021-06-12 22:34:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216910443] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:25,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:25,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 22:34:25,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317115043] [2021-06-12 22:34:25,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:34:25,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:25,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:34:25,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:25,004 INFO L87 Difference]: Start difference. First operand 72 states and 140 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:25,139 INFO L93 Difference]: Finished difference Result 103 states and 199 transitions. [2021-06-12 22:34:25,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:34:25,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:34:25,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:25,140 INFO L225 Difference]: With dead ends: 103 [2021-06-12 22:34:25,140 INFO L226 Difference]: Without dead ends: 94 [2021-06-12 22:34:25,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:34:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-12 22:34:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-06-12 22:34:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 143 transitions. [2021-06-12 22:34:25,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 143 transitions. Word has length 15 [2021-06-12 22:34:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:25,147 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 143 transitions. [2021-06-12 22:34:25,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 143 transitions. [2021-06-12 22:34:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:25,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:25,148 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:25,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-12 22:34:25,148 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash -55242805, now seen corresponding path program 1 times [2021-06-12 22:34:25,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:25,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875496030] [2021-06-12 22:34:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875496030] [2021-06-12 22:34:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875496030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390209695] [2021-06-12 22:34:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:25,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:34:25,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390209695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:25,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:25,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:34:25,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089966934] [2021-06-12 22:34:25,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:25,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:25,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:25,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:25,356 INFO L87 Difference]: Start difference. First operand 74 states and 143 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:25,427 INFO L93 Difference]: Finished difference Result 108 states and 208 transitions. [2021-06-12 22:34:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:25,428 INFO L225 Difference]: With dead ends: 108 [2021-06-12 22:34:25,428 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 22:34:25,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 22:34:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 69. [2021-06-12 22:34:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0) internal successors, (136), 68 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 136 transitions. [2021-06-12 22:34:25,431 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 136 transitions. Word has length 17 [2021-06-12 22:34:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:25,431 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 136 transitions. [2021-06-12 22:34:25,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,432 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 136 transitions. [2021-06-12 22:34:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:25,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:25,432 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:25,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 22:34:25,641 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:25,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1323979185, now seen corresponding path program 1 times [2021-06-12 22:34:25,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:25,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773555337] [2021-06-12 22:34:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773555337] [2021-06-12 22:34:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773555337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:25,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:25,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:25,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872148407] [2021-06-12 22:34:25,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:25,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:25,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:25,658 INFO L87 Difference]: Start difference. First operand 69 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:25,710 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-06-12 22:34:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:25,711 INFO L225 Difference]: With dead ends: 120 [2021-06-12 22:34:25,711 INFO L226 Difference]: Without dead ends: 109 [2021-06-12 22:34:25,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-12 22:34:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 69. [2021-06-12 22:34:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9705882352941178) internal successors, (134), 68 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 134 transitions. [2021-06-12 22:34:25,719 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 134 transitions. Word has length 17 [2021-06-12 22:34:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:25,719 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 134 transitions. [2021-06-12 22:34:25,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 134 transitions. [2021-06-12 22:34:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:25,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:25,719 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:25,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-12 22:34:25,720 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1212131849, now seen corresponding path program 2 times [2021-06-12 22:34:25,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:25,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722259560] [2021-06-12 22:34:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:25,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722259560] [2021-06-12 22:34:25,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722259560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:25,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882024468] [2021-06-12 22:34:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:25,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:25,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:34:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:25,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882024468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:25,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:25,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:34:25,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993694829] [2021-06-12 22:34:25,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:25,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:25,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:25,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:25,825 INFO L87 Difference]: Start difference. First operand 69 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:25,877 INFO L93 Difference]: Finished difference Result 116 states and 219 transitions. [2021-06-12 22:34:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:25,878 INFO L225 Difference]: With dead ends: 116 [2021-06-12 22:34:25,878 INFO L226 Difference]: Without dead ends: 116 [2021-06-12 22:34:25,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-12 22:34:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2021-06-12 22:34:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2021-06-12 22:34:25,882 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 17 [2021-06-12 22:34:25,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:25,882 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2021-06-12 22:34:25,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:25,882 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2021-06-12 22:34:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:25,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:25,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 22:34:26,097 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash 308167817, now seen corresponding path program 2 times [2021-06-12 22:34:26,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481945006] [2021-06-12 22:34:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481945006] [2021-06-12 22:34:26,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481945006] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696315504] [2021-06-12 22:34:26,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,118 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,187 INFO L93 Difference]: Finished difference Result 153 states and 286 transitions. [2021-06-12 22:34:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:34:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,188 INFO L225 Difference]: With dead ends: 153 [2021-06-12 22:34:26,188 INFO L226 Difference]: Without dead ends: 149 [2021-06-12 22:34:26,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-12 22:34:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 80. [2021-06-12 22:34:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-12 22:34:26,194 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 17 [2021-06-12 22:34:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,194 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-12 22:34:26,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-12 22:34:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,194 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-12 22:34:26,195 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1656584079, now seen corresponding path program 3 times [2021-06-12 22:34:26,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446908407] [2021-06-12 22:34:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446908407] [2021-06-12 22:34:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446908407] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751751635] [2021-06-12 22:34:26,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,220 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,285 INFO L93 Difference]: Finished difference Result 126 states and 243 transitions. [2021-06-12 22:34:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:34:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,286 INFO L225 Difference]: With dead ends: 126 [2021-06-12 22:34:26,287 INFO L226 Difference]: Without dead ends: 126 [2021-06-12 22:34:26,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-12 22:34:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 72. [2021-06-12 22:34:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-06-12 22:34:26,289 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-06-12 22:34:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,290 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-06-12 22:34:26,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-06-12 22:34:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,291 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-12 22:34:26,291 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2146658699, now seen corresponding path program 3 times [2021-06-12 22:34:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988231397] [2021-06-12 22:34:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988231397] [2021-06-12 22:34:26,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988231397] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747780002] [2021-06-12 22:34:26,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,314 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,362 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-12 22:34:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:34:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,364 INFO L225 Difference]: With dead ends: 86 [2021-06-12 22:34:26,364 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 22:34:26,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 22:34:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-12 22:34:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-12 22:34:26,372 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-12 22:34:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,372 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-12 22:34:26,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,373 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-12 22:34:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,373 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-12 22:34:26,373 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,374 INFO L82 PathProgramCache]: Analyzing trace with hash -60801859, now seen corresponding path program 4 times [2021-06-12 22:34:26,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207812208] [2021-06-12 22:34:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207812208] [2021-06-12 22:34:26,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207812208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:26,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553095327] [2021-06-12 22:34:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:26,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:26,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 22:34:26,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553095327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:26,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:26,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:34:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221847513] [2021-06-12 22:34:26,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,458 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,519 INFO L93 Difference]: Finished difference Result 124 states and 233 transitions. [2021-06-12 22:34:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:34:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,520 INFO L225 Difference]: With dead ends: 124 [2021-06-12 22:34:26,520 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 22:34:26,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 22:34:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2021-06-12 22:34:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 71 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 141 transitions. [2021-06-12 22:34:26,522 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 141 transitions. Word has length 17 [2021-06-12 22:34:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,522 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 141 transitions. [2021-06-12 22:34:26,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 141 transitions. [2021-06-12 22:34:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,523 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:34:26,747 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash -964765891, now seen corresponding path program 4 times [2021-06-12 22:34:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154892541] [2021-06-12 22:34:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154892541] [2021-06-12 22:34:26,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154892541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880095004] [2021-06-12 22:34:26,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,767 INFO L87 Difference]: Start difference. First operand 72 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,834 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-12 22:34:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:34:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,835 INFO L225 Difference]: With dead ends: 113 [2021-06-12 22:34:26,835 INFO L226 Difference]: Without dead ends: 109 [2021-06-12 22:34:26,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-12 22:34:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-12 22:34:26,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-12 22:34:26,838 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-12 22:34:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,838 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-12 22:34:26,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-12 22:34:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,839 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-12 22:34:26,839 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash 383650371, now seen corresponding path program 5 times [2021-06-12 22:34:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043751773] [2021-06-12 22:34:26,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043751773] [2021-06-12 22:34:26,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043751773] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138265813] [2021-06-12 22:34:26,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,863 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:26,932 INFO L93 Difference]: Finished difference Result 114 states and 216 transitions. [2021-06-12 22:34:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:26,934 INFO L225 Difference]: With dead ends: 114 [2021-06-12 22:34:26,934 INFO L226 Difference]: Without dead ends: 114 [2021-06-12 22:34:26,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-12 22:34:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 82. [2021-06-12 22:34:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 81 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 161 transitions. [2021-06-12 22:34:26,937 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 161 transitions. Word has length 17 [2021-06-12 22:34:26,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:26,937 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 161 transitions. [2021-06-12 22:34:26,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 161 transitions. [2021-06-12 22:34:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:26,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:26,938 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:26,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-12 22:34:26,938 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:26,938 INFO L82 PathProgramCache]: Analyzing trace with hash 873724991, now seen corresponding path program 5 times [2021-06-12 22:34:26,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:26,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099077263] [2021-06-12 22:34:26,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:26,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099077263] [2021-06-12 22:34:26,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099077263] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:26,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:26,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:26,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676039225] [2021-06-12 22:34:26,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:26,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:26,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:26,959 INFO L87 Difference]: Start difference. First operand 82 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:27,029 INFO L93 Difference]: Finished difference Result 139 states and 260 transitions. [2021-06-12 22:34:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:34:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:27,030 INFO L225 Difference]: With dead ends: 139 [2021-06-12 22:34:27,030 INFO L226 Difference]: Without dead ends: 136 [2021-06-12 22:34:27,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:34:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-12 22:34:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 81. [2021-06-12 22:34:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.975) internal successors, (158), 80 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 158 transitions. [2021-06-12 22:34:27,033 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 158 transitions. Word has length 17 [2021-06-12 22:34:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:27,033 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 158 transitions. [2021-06-12 22:34:27,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 158 transitions. [2021-06-12 22:34:27,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:27,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:27,034 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:27,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-12 22:34:27,034 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1721217585, now seen corresponding path program 6 times [2021-06-12 22:34:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:27,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372359378] [2021-06-12 22:34:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:27,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:27,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:27,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372359378] [2021-06-12 22:34:27,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372359378] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:27,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:27,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:27,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745686307] [2021-06-12 22:34:27,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:27,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:27,057 INFO L87 Difference]: Start difference. First operand 81 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:27,109 INFO L93 Difference]: Finished difference Result 105 states and 195 transitions. [2021-06-12 22:34:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:27,109 INFO L225 Difference]: With dead ends: 105 [2021-06-12 22:34:27,110 INFO L226 Difference]: Without dead ends: 105 [2021-06-12 22:34:27,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-12 22:34:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-06-12 22:34:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2021-06-12 22:34:27,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 17 [2021-06-12 22:34:27,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:27,112 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2021-06-12 22:34:27,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2021-06-12 22:34:27,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:34:27,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:27,113 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:27,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-12 22:34:27,113 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:27,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:27,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1788806479, now seen corresponding path program 6 times [2021-06-12 22:34:27,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:27,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968566880] [2021-06-12 22:34:27,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:27,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:27,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968566880] [2021-06-12 22:34:27,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968566880] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:27,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:34:27,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 22:34:27,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729403808] [2021-06-12 22:34:27,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:34:27,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:34:27,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:34:27,128 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:27,173 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-12 22:34:27,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:34:27,181 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:34:27,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:27,181 INFO L225 Difference]: With dead ends: 82 [2021-06-12 22:34:27,181 INFO L226 Difference]: Without dead ends: 76 [2021-06-12 22:34:27,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:34:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-12 22:34:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-06-12 22:34:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 67 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 131 transitions. [2021-06-12 22:34:27,185 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 131 transitions. Word has length 17 [2021-06-12 22:34:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:27,186 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 131 transitions. [2021-06-12 22:34:27,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 131 transitions. [2021-06-12 22:34:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:27,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:27,186 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:27,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-12 22:34:27,186 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash 24314285, now seen corresponding path program 1 times [2021-06-12 22:34:27,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:27,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197465574] [2021-06-12 22:34:27,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:27,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197465574] [2021-06-12 22:34:27,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197465574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:27,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637581424] [2021-06-12 22:34:27,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:27,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:27,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637581424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:27,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:27,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:27,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742931093] [2021-06-12 22:34:27,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:27,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:27,505 INFO L87 Difference]: Start difference. First operand 68 states and 131 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:27,705 INFO L93 Difference]: Finished difference Result 87 states and 162 transitions. [2021-06-12 22:34:27,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:27,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:27,706 INFO L225 Difference]: With dead ends: 87 [2021-06-12 22:34:27,706 INFO L226 Difference]: Without dead ends: 60 [2021-06-12 22:34:27,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:34:27,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-12 22:34:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-06-12 22:34:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 59 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 112 transitions. [2021-06-12 22:34:27,708 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 112 transitions. Word has length 19 [2021-06-12 22:34:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:27,708 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 112 transitions. [2021-06-12 22:34:27,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:27,709 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 112 transitions. [2021-06-12 22:34:27,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:27,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:27,709 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:27,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:27,925 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:27,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:27,925 INFO L82 PathProgramCache]: Analyzing trace with hash -640382641, now seen corresponding path program 2 times [2021-06-12 22:34:27,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:27,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853657034] [2021-06-12 22:34:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853657034] [2021-06-12 22:34:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853657034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370244187] [2021-06-12 22:34:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:28,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:28,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:28,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370244187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:28,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:28,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:28,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275009680] [2021-06-12 22:34:28,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:28,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:28,249 INFO L87 Difference]: Start difference. First operand 60 states and 112 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:28,444 INFO L93 Difference]: Finished difference Result 78 states and 138 transitions. [2021-06-12 22:34:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:28,445 INFO L225 Difference]: With dead ends: 78 [2021-06-12 22:34:28,445 INFO L226 Difference]: Without dead ends: 62 [2021-06-12 22:34:28,446 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:34:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-12 22:34:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-06-12 22:34:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8833333333333333) internal successors, (113), 60 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 113 transitions. [2021-06-12 22:34:28,450 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 113 transitions. Word has length 19 [2021-06-12 22:34:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:28,451 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 113 transitions. [2021-06-12 22:34:28,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 113 transitions. [2021-06-12 22:34:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:28,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:28,451 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:28,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 22:34:28,665 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:28,665 INFO L82 PathProgramCache]: Analyzing trace with hash 111018267, now seen corresponding path program 3 times [2021-06-12 22:34:28,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:28,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545587753] [2021-06-12 22:34:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:28,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545587753] [2021-06-12 22:34:28,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545587753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:28,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528439514] [2021-06-12 22:34:28,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:28,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:34:28,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:28,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528439514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:28,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:28,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:28,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536179760] [2021-06-12 22:34:28,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:28,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:28,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:28,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:28,979 INFO L87 Difference]: Start difference. First operand 61 states and 113 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:29,127 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-06-12 22:34:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:29,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:29,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:29,142 INFO L225 Difference]: With dead ends: 80 [2021-06-12 22:34:29,143 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 22:34:29,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:34:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 22:34:29,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-06-12 22:34:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-12 22:34:29,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 19 [2021-06-12 22:34:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:29,145 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-12 22:34:29,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-12 22:34:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:29,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:29,145 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:29,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:29,349 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:29,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:29,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1215248019, now seen corresponding path program 4 times [2021-06-12 22:34:29,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:29,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038719636] [2021-06-12 22:34:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:29,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:29,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038719636] [2021-06-12 22:34:29,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038719636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:29,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037733550] [2021-06-12 22:34:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:29,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:29,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:29,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:29,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:29,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037733550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:29,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:29,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:29,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471944521] [2021-06-12 22:34:29,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:29,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:29,678 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:30,057 INFO L93 Difference]: Finished difference Result 109 states and 201 transitions. [2021-06-12 22:34:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:34:30,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:30,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:30,058 INFO L225 Difference]: With dead ends: 109 [2021-06-12 22:34:30,058 INFO L226 Difference]: Without dead ends: 99 [2021-06-12 22:34:30,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:34:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-12 22:34:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-06-12 22:34:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.8941176470588235) internal successors, (161), 85 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 161 transitions. [2021-06-12 22:34:30,061 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 161 transitions. Word has length 19 [2021-06-12 22:34:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:30,061 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 161 transitions. [2021-06-12 22:34:30,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 161 transitions. [2021-06-12 22:34:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:30,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:30,062 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:30,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 22:34:30,269 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:30,269 INFO L82 PathProgramCache]: Analyzing trace with hash -545203817, now seen corresponding path program 5 times [2021-06-12 22:34:30,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:30,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363850442] [2021-06-12 22:34:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:30,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:30,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363850442] [2021-06-12 22:34:30,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363850442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:30,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442489575] [2021-06-12 22:34:30,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:30,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:30,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:30,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442489575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:30,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:30,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:30,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905610129] [2021-06-12 22:34:30,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:30,582 INFO L87 Difference]: Start difference. First operand 86 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:30,646 INFO L93 Difference]: Finished difference Result 96 states and 174 transitions. [2021-06-12 22:34:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:34:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:30,646 INFO L225 Difference]: With dead ends: 96 [2021-06-12 22:34:30,646 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 22:34:30,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 22:34:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-06-12 22:34:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9210526315789473) internal successors, (146), 76 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 146 transitions. [2021-06-12 22:34:30,649 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 146 transitions. Word has length 19 [2021-06-12 22:34:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:30,649 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 146 transitions. [2021-06-12 22:34:30,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 146 transitions. [2021-06-12 22:34:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:30,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:30,649 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:30,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:34:30,861 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1290089747, now seen corresponding path program 6 times [2021-06-12 22:34:30,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:30,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453032461] [2021-06-12 22:34:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:30,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:30,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453032461] [2021-06-12 22:34:30,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453032461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:30,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577909344] [2021-06-12 22:34:30,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:30,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:34:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:31,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577909344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:31,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:31,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:31,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134512458] [2021-06-12 22:34:31,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:31,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:31,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:31,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:31,155 INFO L87 Difference]: Start difference. First operand 77 states and 146 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:31,464 INFO L93 Difference]: Finished difference Result 108 states and 202 transitions. [2021-06-12 22:34:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:31,464 INFO L225 Difference]: With dead ends: 108 [2021-06-12 22:34:31,465 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 22:34:31,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:34:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 22:34:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-12 22:34:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.9268292682926829) internal successors, (158), 82 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 158 transitions. [2021-06-12 22:34:31,466 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 158 transitions. Word has length 19 [2021-06-12 22:34:31,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:31,467 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 158 transitions. [2021-06-12 22:34:31,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 158 transitions. [2021-06-12 22:34:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:31,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:31,467 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:31,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 22:34:31,677 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash -538688839, now seen corresponding path program 7 times [2021-06-12 22:34:31,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:31,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261216602] [2021-06-12 22:34:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:31,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:31,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261216602] [2021-06-12 22:34:31,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261216602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:31,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956793768] [2021-06-12 22:34:31,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:31,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956793768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:31,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:31,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:31,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733010373] [2021-06-12 22:34:31,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:31,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:31,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:31,952 INFO L87 Difference]: Start difference. First operand 83 states and 158 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:32,177 INFO L93 Difference]: Finished difference Result 113 states and 210 transitions. [2021-06-12 22:34:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:32,178 INFO L225 Difference]: With dead ends: 113 [2021-06-12 22:34:32,178 INFO L226 Difference]: Without dead ends: 100 [2021-06-12 22:34:32,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:34:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-12 22:34:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-06-12 22:34:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9166666666666667) internal successors, (161), 84 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 161 transitions. [2021-06-12 22:34:32,180 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 161 transitions. Word has length 19 [2021-06-12 22:34:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:32,181 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 161 transitions. [2021-06-12 22:34:32,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 161 transitions. [2021-06-12 22:34:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:32,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:32,181 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:32,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:34:32,393 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:32,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1864955125, now seen corresponding path program 8 times [2021-06-12 22:34:32,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:32,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531698589] [2021-06-12 22:34:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:32,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:32,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531698589] [2021-06-12 22:34:32,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531698589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:32,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244388694] [2021-06-12 22:34:32,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:32,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:32,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244388694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:32,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:32,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593454542] [2021-06-12 22:34:32,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:32,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:32,664 INFO L87 Difference]: Start difference. First operand 85 states and 161 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:32,767 INFO L93 Difference]: Finished difference Result 101 states and 183 transitions. [2021-06-12 22:34:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:32,767 INFO L225 Difference]: With dead ends: 101 [2021-06-12 22:34:32,767 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 22:34:32,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 22:34:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2021-06-12 22:34:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9156626506024097) internal successors, (159), 83 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 159 transitions. [2021-06-12 22:34:32,770 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 159 transitions. Word has length 19 [2021-06-12 22:34:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:32,770 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 159 transitions. [2021-06-12 22:34:32,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:32,770 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 159 transitions. [2021-06-12 22:34:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:32,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:32,770 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:32,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:34:32,971 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:32,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1194910923, now seen corresponding path program 9 times [2021-06-12 22:34:32,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:32,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645796084] [2021-06-12 22:34:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645796084] [2021-06-12 22:34:33,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645796084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616756237] [2021-06-12 22:34:33,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:33,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:34:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:33,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616756237] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:33,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:33,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:33,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827652989] [2021-06-12 22:34:33,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:33,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:33,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:33,250 INFO L87 Difference]: Start difference. First operand 84 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:33,349 INFO L93 Difference]: Finished difference Result 93 states and 170 transitions. [2021-06-12 22:34:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:33,350 INFO L225 Difference]: With dead ends: 93 [2021-06-12 22:34:33,350 INFO L226 Difference]: Without dead ends: 81 [2021-06-12 22:34:33,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-12 22:34:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-06-12 22:34:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.925) internal successors, (154), 80 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 154 transitions. [2021-06-12 22:34:33,353 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 154 transitions. Word has length 19 [2021-06-12 22:34:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:33,353 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 154 transitions. [2021-06-12 22:34:33,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 154 transitions. [2021-06-12 22:34:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:33,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:33,353 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:33,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:33,575 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:33,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1143148071, now seen corresponding path program 10 times [2021-06-12 22:34:33,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:33,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929975100] [2021-06-12 22:34:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929975100] [2021-06-12 22:34:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929975100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065332113] [2021-06-12 22:34:33,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:33,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:33,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065332113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:33,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:33,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999098539] [2021-06-12 22:34:33,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:33,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:33,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:33,819 INFO L87 Difference]: Start difference. First operand 81 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:34,682 INFO L93 Difference]: Finished difference Result 176 states and 352 transitions. [2021-06-12 22:34:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:34:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:34,683 INFO L225 Difference]: With dead ends: 176 [2021-06-12 22:34:34,683 INFO L226 Difference]: Without dead ends: 159 [2021-06-12 22:34:34,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 736.6ms TimeCoverageRelationStatistics Valid=566, Invalid=1984, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:34:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-12 22:34:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 108. [2021-06-12 22:34:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0373831775700935) internal successors, (218), 107 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 218 transitions. [2021-06-12 22:34:34,687 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 218 transitions. Word has length 19 [2021-06-12 22:34:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:34,687 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 218 transitions. [2021-06-12 22:34:34,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 218 transitions. [2021-06-12 22:34:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:34,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:34,688 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:34,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 22:34:34,913 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash 486925987, now seen corresponding path program 11 times [2021-06-12 22:34:34,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:34,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361876139] [2021-06-12 22:34:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:34,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361876139] [2021-06-12 22:34:34,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361876139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899891264] [2021-06-12 22:34:34,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:35,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:35,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:35,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:35,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899891264] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:35,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:35,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:35,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203543335] [2021-06-12 22:34:35,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:35,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:35,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:35,178 INFO L87 Difference]: Start difference. First operand 108 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:35,334 INFO L93 Difference]: Finished difference Result 138 states and 273 transitions. [2021-06-12 22:34:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:35,336 INFO L225 Difference]: With dead ends: 138 [2021-06-12 22:34:35,336 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 22:34:35,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:34:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 22:34:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-06-12 22:34:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-06-12 22:34:35,339 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-06-12 22:34:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:35,341 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-06-12 22:34:35,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-06-12 22:34:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:35,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:35,342 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:35,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:35,557 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1562637143, now seen corresponding path program 12 times [2021-06-12 22:34:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:35,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784141916] [2021-06-12 22:34:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:35,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784141916] [2021-06-12 22:34:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784141916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:35,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302713767] [2021-06-12 22:34:35,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:35,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:34:35,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:35,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:35,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302713767] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:35,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:35,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:35,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876012318] [2021-06-12 22:34:35,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:35,839 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:35,994 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-12 22:34:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:35,995 INFO L225 Difference]: With dead ends: 128 [2021-06-12 22:34:35,995 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 22:34:35,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:34:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 22:34:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2021-06-12 22:34:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-12 22:34:35,997 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-12 22:34:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:35,998 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-12 22:34:35,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-12 22:34:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:35,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:35,998 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:36,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 22:34:36,199 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1069677465, now seen corresponding path program 13 times [2021-06-12 22:34:36,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:36,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799952566] [2021-06-12 22:34:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799952566] [2021-06-12 22:34:36,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799952566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:36,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888999955] [2021-06-12 22:34:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:36,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:36,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888999955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:36,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:36,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:36,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078337687] [2021-06-12 22:34:36,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:36,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:36,458 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:36,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:36,744 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-06-12 22:34:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:34:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:36,745 INFO L225 Difference]: With dead ends: 128 [2021-06-12 22:34:36,745 INFO L226 Difference]: Without dead ends: 119 [2021-06-12 22:34:36,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 291.2ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:34:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-12 22:34:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-06-12 22:34:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-12 22:34:36,749 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-06-12 22:34:36,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:36,749 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-12 22:34:36,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-12 22:34:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:36,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:36,749 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:36,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:36,974 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:36,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:36,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1532453059, now seen corresponding path program 14 times [2021-06-12 22:34:36,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:36,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914271761] [2021-06-12 22:34:36,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:37,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:37,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914271761] [2021-06-12 22:34:37,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914271761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:37,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144586563] [2021-06-12 22:34:37,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:37,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144586563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:37,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:37,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14228948] [2021-06-12 22:34:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:37,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:37,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:37,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:37,245 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:37,642 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-06-12 22:34:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:34:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:37,643 INFO L225 Difference]: With dead ends: 202 [2021-06-12 22:34:37,643 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 22:34:37,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:34:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 22:34:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 149. [2021-06-12 22:34:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-06-12 22:34:37,648 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 19 [2021-06-12 22:34:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:37,648 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-06-12 22:34:37,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-06-12 22:34:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:37,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:37,649 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:37,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 22:34:37,865 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1450387207, now seen corresponding path program 15 times [2021-06-12 22:34:37,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:37,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823282776] [2021-06-12 22:34:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:37,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823282776] [2021-06-12 22:34:37,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823282776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:37,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482326268] [2021-06-12 22:34:37,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:37,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:34:37,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:38,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482326268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:38,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:38,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:38,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387983828] [2021-06-12 22:34:38,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:38,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:38,138 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:38,357 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-06-12 22:34:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:34:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:38,358 INFO L225 Difference]: With dead ends: 184 [2021-06-12 22:34:38,358 INFO L226 Difference]: Without dead ends: 171 [2021-06-12 22:34:38,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:34:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-06-12 22:34:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 153. [2021-06-12 22:34:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1842105263157894) internal successors, (332), 152 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 332 transitions. [2021-06-12 22:34:38,362 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 332 transitions. Word has length 19 [2021-06-12 22:34:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:38,362 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 332 transitions. [2021-06-12 22:34:38,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 332 transitions. [2021-06-12 22:34:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:38,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:38,362 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:38,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:34:38,581 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:38,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1731743665, now seen corresponding path program 16 times [2021-06-12 22:34:38,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:38,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947894102] [2021-06-12 22:34:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:38,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:38,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947894102] [2021-06-12 22:34:38,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947894102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:38,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708323296] [2021-06-12 22:34:38,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:38,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:38,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:38,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:38,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708323296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:38,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:38,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:38,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370806216] [2021-06-12 22:34:38,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:38,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:38,817 INFO L87 Difference]: Start difference. First operand 153 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:39,378 INFO L93 Difference]: Finished difference Result 335 states and 734 transitions. [2021-06-12 22:34:39,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:34:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:39,380 INFO L225 Difference]: With dead ends: 335 [2021-06-12 22:34:39,380 INFO L226 Difference]: Without dead ends: 319 [2021-06-12 22:34:39,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:34:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-12 22:34:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 224. [2021-06-12 22:34:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2600896860986546) internal successors, (504), 223 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 504 transitions. [2021-06-12 22:34:39,386 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 504 transitions. Word has length 19 [2021-06-12 22:34:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:39,386 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 504 transitions. [2021-06-12 22:34:39,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:39,386 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 504 transitions. [2021-06-12 22:34:39,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:39,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:39,387 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:39,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 22:34:39,601 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:39,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1036341529, now seen corresponding path program 17 times [2021-06-12 22:34:39,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:39,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455495928] [2021-06-12 22:34:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:39,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455495928] [2021-06-12 22:34:39,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455495928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:39,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722998085] [2021-06-12 22:34:39,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:39,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:39,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722998085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:39,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231120184] [2021-06-12 22:34:39,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:39,895 INFO L87 Difference]: Start difference. First operand 224 states and 504 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:40,252 INFO L93 Difference]: Finished difference Result 349 states and 784 transitions. [2021-06-12 22:34:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:34:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:40,254 INFO L225 Difference]: With dead ends: 349 [2021-06-12 22:34:40,254 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 22:34:40,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:34:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 22:34:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 250. [2021-06-12 22:34:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3453815261044175) internal successors, (584), 249 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 584 transitions. [2021-06-12 22:34:40,260 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 584 transitions. Word has length 19 [2021-06-12 22:34:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:40,260 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 584 transitions. [2021-06-12 22:34:40,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 584 transitions. [2021-06-12 22:34:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:40,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:40,261 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:40,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:34:40,481 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:40,481 INFO L82 PathProgramCache]: Analyzing trace with hash 881151661, now seen corresponding path program 18 times [2021-06-12 22:34:40,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:40,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068509092] [2021-06-12 22:34:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:40,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068509092] [2021-06-12 22:34:40,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068509092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:40,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969458874] [2021-06-12 22:34:40,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:40,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:34:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969458874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:40,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:40,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609226962] [2021-06-12 22:34:40,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:40,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:40,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:40,744 INFO L87 Difference]: Start difference. First operand 250 states and 584 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:40,941 INFO L93 Difference]: Finished difference Result 293 states and 661 transitions. [2021-06-12 22:34:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:40,943 INFO L225 Difference]: With dead ends: 293 [2021-06-12 22:34:40,943 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 22:34:40,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:34:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 22:34:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 250. [2021-06-12 22:34:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3373493975903616) internal successors, (582), 249 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 582 transitions. [2021-06-12 22:34:40,950 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 582 transitions. Word has length 19 [2021-06-12 22:34:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:40,950 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 582 transitions. [2021-06-12 22:34:40,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 582 transitions. [2021-06-12 22:34:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:40,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:40,951 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:41,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 22:34:41,152 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash 306286283, now seen corresponding path program 19 times [2021-06-12 22:34:41,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:41,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830247145] [2021-06-12 22:34:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:41,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830247145] [2021-06-12 22:34:41,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830247145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:41,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407945426] [2021-06-12 22:34:41,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:41,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407945426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:41,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:41,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:41,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176959946] [2021-06-12 22:34:41,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:41,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:41,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:41,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:41,396 INFO L87 Difference]: Start difference. First operand 250 states and 582 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:41,631 INFO L93 Difference]: Finished difference Result 290 states and 653 transitions. [2021-06-12 22:34:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:41,631 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:41,632 INFO L225 Difference]: With dead ends: 290 [2021-06-12 22:34:41,633 INFO L226 Difference]: Without dead ends: 273 [2021-06-12 22:34:41,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:34:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-12 22:34:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 248. [2021-06-12 22:34:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3441295546558703) internal successors, (579), 247 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 579 transitions. [2021-06-12 22:34:41,638 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 579 transitions. Word has length 19 [2021-06-12 22:34:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:41,638 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 579 transitions. [2021-06-12 22:34:41,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 579 transitions. [2021-06-12 22:34:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:41,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:41,639 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:41,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:41,861 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash 976330485, now seen corresponding path program 20 times [2021-06-12 22:34:41,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:41,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207634283] [2021-06-12 22:34:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:41,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207634283] [2021-06-12 22:34:41,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207634283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:41,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755136029] [2021-06-12 22:34:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:41,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:41,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755136029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:42,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:42,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:42,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392310948] [2021-06-12 22:34:42,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:42,135 INFO L87 Difference]: Start difference. First operand 248 states and 579 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:42,326 INFO L93 Difference]: Finished difference Result 277 states and 632 transitions. [2021-06-12 22:34:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:42,327 INFO L225 Difference]: With dead ends: 277 [2021-06-12 22:34:42,327 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 22:34:42,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:34:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 22:34:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-06-12 22:34:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.341463414634146) internal successors, (576), 246 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 576 transitions. [2021-06-12 22:34:42,332 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 576 transitions. Word has length 19 [2021-06-12 22:34:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:42,333 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 576 transitions. [2021-06-12 22:34:42,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 576 transitions. [2021-06-12 22:34:42,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:42,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:42,333 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:42,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 22:34:42,550 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1636799901, now seen corresponding path program 21 times [2021-06-12 22:34:42,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:42,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888628529] [2021-06-12 22:34:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:42,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:42,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888628529] [2021-06-12 22:34:42,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888628529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:42,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053229995] [2021-06-12 22:34:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:42,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:34:42,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:42,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:42,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053229995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:42,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:42,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:42,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70675896] [2021-06-12 22:34:42,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:42,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:42,851 INFO L87 Difference]: Start difference. First operand 247 states and 576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:43,220 INFO L93 Difference]: Finished difference Result 368 states and 842 transitions. [2021-06-12 22:34:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:34:43,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:43,222 INFO L225 Difference]: With dead ends: 368 [2021-06-12 22:34:43,222 INFO L226 Difference]: Without dead ends: 356 [2021-06-12 22:34:43,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:34:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-12 22:34:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 249. [2021-06-12 22:34:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.350806451612903) internal successors, (583), 248 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 583 transitions. [2021-06-12 22:34:43,227 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 583 transitions. Word has length 19 [2021-06-12 22:34:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:43,227 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 583 transitions. [2021-06-12 22:34:43,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 583 transitions. [2021-06-12 22:34:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:43,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:43,228 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:43,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:43,437 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:43,437 INFO L82 PathProgramCache]: Analyzing trace with hash -561088745, now seen corresponding path program 22 times [2021-06-12 22:34:43,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:43,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992598181] [2021-06-12 22:34:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:43,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:43,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992598181] [2021-06-12 22:34:43,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992598181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:43,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447717369] [2021-06-12 22:34:43,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:43,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:43,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:43,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447717369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:43,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:43,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:43,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440528504] [2021-06-12 22:34:43,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:43,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:43,682 INFO L87 Difference]: Start difference. First operand 249 states and 583 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:44,222 INFO L93 Difference]: Finished difference Result 314 states and 713 transitions. [2021-06-12 22:34:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:34:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:44,224 INFO L225 Difference]: With dead ends: 314 [2021-06-12 22:34:44,224 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 22:34:44,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=368, Invalid=1438, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:34:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 22:34:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2021-06-12 22:34:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.342857142857143) internal successors, (574), 245 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 574 transitions. [2021-06-12 22:34:44,229 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 574 transitions. Word has length 19 [2021-06-12 22:34:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:44,229 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 574 transitions. [2021-06-12 22:34:44,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 574 transitions. [2021-06-12 22:34:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:44,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:44,230 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:44,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-12 22:34:44,452 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:44,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1101563943, now seen corresponding path program 23 times [2021-06-12 22:34:44,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:44,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872828238] [2021-06-12 22:34:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:44,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872828238] [2021-06-12 22:34:44,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872828238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:44,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726924470] [2021-06-12 22:34:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:44,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:44,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:44,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726924470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:44,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:44,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:44,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639442854] [2021-06-12 22:34:44,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:44,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:44,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:44,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:44,684 INFO L87 Difference]: Start difference. First operand 246 states and 574 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:45,119 INFO L93 Difference]: Finished difference Result 388 states and 906 transitions. [2021-06-12 22:34:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:34:45,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:45,120 INFO L225 Difference]: With dead ends: 388 [2021-06-12 22:34:45,120 INFO L226 Difference]: Without dead ends: 379 [2021-06-12 22:34:45,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:34:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-12 22:34:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 256. [2021-06-12 22:34:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.392156862745098) internal successors, (610), 255 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 610 transitions. [2021-06-12 22:34:45,126 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 610 transitions. Word has length 19 [2021-06-12 22:34:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:45,126 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 610 transitions. [2021-06-12 22:34:45,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 610 transitions. [2021-06-12 22:34:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:45,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:45,127 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:45,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:45,349 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1247703337, now seen corresponding path program 24 times [2021-06-12 22:34:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:45,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372809457] [2021-06-12 22:34:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:45,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372809457] [2021-06-12 22:34:45,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372809457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:45,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236532440] [2021-06-12 22:34:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:45,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:34:45,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:45,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:45,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236532440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:45,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:45,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:45,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681133867] [2021-06-12 22:34:45,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:45,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:45,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:45,610 INFO L87 Difference]: Start difference. First operand 256 states and 610 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:45,858 INFO L93 Difference]: Finished difference Result 361 states and 831 transitions. [2021-06-12 22:34:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:34:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:45,859 INFO L225 Difference]: With dead ends: 361 [2021-06-12 22:34:45,859 INFO L226 Difference]: Without dead ends: 344 [2021-06-12 22:34:45,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:34:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-12 22:34:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 291. [2021-06-12 22:34:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.406896551724138) internal successors, (698), 290 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 698 transitions. [2021-06-12 22:34:45,864 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 698 transitions. Word has length 19 [2021-06-12 22:34:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:45,864 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 698 transitions. [2021-06-12 22:34:45,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 698 transitions. [2021-06-12 22:34:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:45,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:45,865 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:46,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 22:34:46,081 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193749, now seen corresponding path program 25 times [2021-06-12 22:34:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:46,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263105920] [2021-06-12 22:34:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:46,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:46,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263105920] [2021-06-12 22:34:46,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263105920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:46,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106965381] [2021-06-12 22:34:46,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:34:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:46,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106965381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:46,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:46,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:46,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797171183] [2021-06-12 22:34:46,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:46,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:46,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:46,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:46,376 INFO L87 Difference]: Start difference. First operand 291 states and 698 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:46,788 INFO L93 Difference]: Finished difference Result 506 states and 1196 transitions. [2021-06-12 22:34:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:34:46,793 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:46,795 INFO L225 Difference]: With dead ends: 506 [2021-06-12 22:34:46,795 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 22:34:46,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:34:46,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 22:34:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 330. [2021-06-12 22:34:46,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.3951367781155017) internal successors, (788), 329 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 788 transitions. [2021-06-12 22:34:46,802 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 788 transitions. Word has length 19 [2021-06-12 22:34:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:46,802 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 788 transitions. [2021-06-12 22:34:46,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 788 transitions. [2021-06-12 22:34:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:46,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:46,803 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:47,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:47,026 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:47,026 INFO L82 PathProgramCache]: Analyzing trace with hash 687948011, now seen corresponding path program 26 times [2021-06-12 22:34:47,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:47,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595592198] [2021-06-12 22:34:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:47,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595592198] [2021-06-12 22:34:47,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595592198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:47,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550714290] [2021-06-12 22:34:47,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:47,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:47,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:47,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:47,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:47,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550714290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:47,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:47,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357492870] [2021-06-12 22:34:47,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:47,309 INFO L87 Difference]: Start difference. First operand 330 states and 788 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:47,706 INFO L93 Difference]: Finished difference Result 456 states and 1025 transitions. [2021-06-12 22:34:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:34:47,706 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:47,708 INFO L225 Difference]: With dead ends: 456 [2021-06-12 22:34:47,708 INFO L226 Difference]: Without dead ends: 436 [2021-06-12 22:34:47,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:34:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-12 22:34:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 335. [2021-06-12 22:34:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.3652694610778444) internal successors, (790), 334 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 790 transitions. [2021-06-12 22:34:47,715 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 790 transitions. Word has length 19 [2021-06-12 22:34:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:47,716 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 790 transitions. [2021-06-12 22:34:47,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 790 transitions. [2021-06-12 22:34:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:47,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:47,717 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:47,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 22:34:47,921 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:47,921 INFO L82 PathProgramCache]: Analyzing trace with hash -332621849, now seen corresponding path program 27 times [2021-06-12 22:34:47,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:47,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102605414] [2021-06-12 22:34:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:48,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:48,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102605414] [2021-06-12 22:34:48,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102605414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:48,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96606436] [2021-06-12 22:34:48,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:48,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:34:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:48,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:48,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96606436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:48,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:48,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:48,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359683483] [2021-06-12 22:34:48,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:48,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:48,170 INFO L87 Difference]: Start difference. First operand 335 states and 790 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:48,408 INFO L93 Difference]: Finished difference Result 389 states and 881 transitions. [2021-06-12 22:34:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:48,409 INFO L225 Difference]: With dead ends: 389 [2021-06-12 22:34:48,409 INFO L226 Difference]: Without dead ends: 370 [2021-06-12 22:34:48,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:34:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-12 22:34:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-12 22:34:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3717105263157894) internal successors, (721), 304 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 721 transitions. [2021-06-12 22:34:48,415 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 721 transitions. Word has length 19 [2021-06-12 22:34:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:48,415 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 721 transitions. [2021-06-12 22:34:48,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 721 transitions. [2021-06-12 22:34:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:48,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:48,416 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:48,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:48,625 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1873029991, now seen corresponding path program 28 times [2021-06-12 22:34:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443135987] [2021-06-12 22:34:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:48,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:48,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:48,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443135987] [2021-06-12 22:34:48,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443135987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:48,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107696657] [2021-06-12 22:34:48,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:48,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:48,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:48,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107696657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:48,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:48,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:48,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791602359] [2021-06-12 22:34:48,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:48,879 INFO L87 Difference]: Start difference. First operand 305 states and 721 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:49,126 INFO L93 Difference]: Finished difference Result 348 states and 785 transitions. [2021-06-12 22:34:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:49,126 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:49,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:49,127 INFO L225 Difference]: With dead ends: 348 [2021-06-12 22:34:49,127 INFO L226 Difference]: Without dead ends: 333 [2021-06-12 22:34:49,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:34:49,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-12 22:34:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 301. [2021-06-12 22:34:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.36) internal successors, (708), 300 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 708 transitions. [2021-06-12 22:34:49,133 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 708 transitions. Word has length 19 [2021-06-12 22:34:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:49,133 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 708 transitions. [2021-06-12 22:34:49,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 708 transitions. [2021-06-12 22:34:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:49,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:49,134 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:49,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 22:34:49,356 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash 264714809, now seen corresponding path program 29 times [2021-06-12 22:34:49,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:49,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065359238] [2021-06-12 22:34:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:49,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:49,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065359238] [2021-06-12 22:34:49,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065359238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:49,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396254686] [2021-06-12 22:34:49,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:49,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:49,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396254686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:49,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:49,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572472683] [2021-06-12 22:34:49,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:49,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:49,596 INFO L87 Difference]: Start difference. First operand 301 states and 708 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:49,950 INFO L93 Difference]: Finished difference Result 332 states and 757 transitions. [2021-06-12 22:34:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:34:49,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:49,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:49,952 INFO L225 Difference]: With dead ends: 332 [2021-06-12 22:34:49,952 INFO L226 Difference]: Without dead ends: 318 [2021-06-12 22:34:49,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:34:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-12 22:34:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 302. [2021-06-12 22:34:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.3488372093023258) internal successors, (707), 301 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 707 transitions. [2021-06-12 22:34:49,957 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 707 transitions. Word has length 19 [2021-06-12 22:34:49,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:49,957 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 707 transitions. [2021-06-12 22:34:49,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:49,957 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 707 transitions. [2021-06-12 22:34:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:49,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:49,958 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:50,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 22:34:50,180 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:50,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1254323989, now seen corresponding path program 30 times [2021-06-12 22:34:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:50,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977546765] [2021-06-12 22:34:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:50,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:50,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977546765] [2021-06-12 22:34:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977546765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:50,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520027938] [2021-06-12 22:34:50,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:50,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:34:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:50,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:50,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:50,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520027938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:50,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:50,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:34:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739800412] [2021-06-12 22:34:50,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:50,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:50,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:50,438 INFO L87 Difference]: Start difference. First operand 302 states and 707 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:50,615 INFO L93 Difference]: Finished difference Result 335 states and 755 transitions. [2021-06-12 22:34:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:34:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:50,616 INFO L225 Difference]: With dead ends: 335 [2021-06-12 22:34:50,616 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 22:34:50,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:34:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 22:34:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2021-06-12 22:34:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.321070234113712) internal successors, (694), 299 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 694 transitions. [2021-06-12 22:34:50,622 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 694 transitions. Word has length 19 [2021-06-12 22:34:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:50,622 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 694 transitions. [2021-06-12 22:34:50,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 694 transitions. [2021-06-12 22:34:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:50,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:50,623 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:50,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:50,847 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1786837659, now seen corresponding path program 31 times [2021-06-12 22:34:50,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:50,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026116614] [2021-06-12 22:34:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:50,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:50,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026116614] [2021-06-12 22:34:50,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026116614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:50,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054714387] [2021-06-12 22:34:50,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:50,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:51,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054714387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:51,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:51,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:51,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504554132] [2021-06-12 22:34:51,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:51,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:51,098 INFO L87 Difference]: Start difference. First operand 300 states and 694 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:51,451 INFO L93 Difference]: Finished difference Result 452 states and 1035 transitions. [2021-06-12 22:34:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:34:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:51,452 INFO L225 Difference]: With dead ends: 452 [2021-06-12 22:34:51,452 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 22:34:51,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=268, Invalid=788, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:34:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 22:34:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 342. [2021-06-12 22:34:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.3870967741935485) internal successors, (814), 341 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 814 transitions. [2021-06-12 22:34:51,458 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 814 transitions. Word has length 19 [2021-06-12 22:34:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:51,458 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 814 transitions. [2021-06-12 22:34:51,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 814 transitions. [2021-06-12 22:34:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:51,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:51,459 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:51,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-12 22:34:51,681 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1586221843, now seen corresponding path program 32 times [2021-06-12 22:34:51,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:51,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071518417] [2021-06-12 22:34:51,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:51,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:51,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071518417] [2021-06-12 22:34:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071518417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:51,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958700434] [2021-06-12 22:34:51,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:51,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:51,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:51,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:51,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958700434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:51,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:51,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:51,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385003947] [2021-06-12 22:34:51,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:51,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:51,949 INFO L87 Difference]: Start difference. First operand 342 states and 814 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:52,312 INFO L93 Difference]: Finished difference Result 461 states and 1071 transitions. [2021-06-12 22:34:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:34:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:52,314 INFO L225 Difference]: With dead ends: 461 [2021-06-12 22:34:52,314 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 22:34:52,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:34:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 22:34:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 354. [2021-06-12 22:34:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-12 22:34:52,321 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-12 22:34:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:52,321 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-12 22:34:52,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-12 22:34:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:52,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:52,322 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:52,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:52,545 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:52,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:52,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1657537633, now seen corresponding path program 33 times [2021-06-12 22:34:52,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:52,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795704056] [2021-06-12 22:34:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:52,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795704056] [2021-06-12 22:34:52,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795704056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316346126] [2021-06-12 22:34:52,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:52,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:34:52,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:52,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316346126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:52,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:52,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:52,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029199506] [2021-06-12 22:34:52,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:52,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:52,808 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:53,067 INFO L93 Difference]: Finished difference Result 411 states and 955 transitions. [2021-06-12 22:34:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:34:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:53,069 INFO L225 Difference]: With dead ends: 411 [2021-06-12 22:34:53,069 INFO L226 Difference]: Without dead ends: 389 [2021-06-12 22:34:53,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 290.1ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:34:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-12 22:34:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 357. [2021-06-12 22:34:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.398876404494382) internal successors, (854), 356 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 854 transitions. [2021-06-12 22:34:53,074 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 854 transitions. Word has length 19 [2021-06-12 22:34:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:53,074 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 854 transitions. [2021-06-12 22:34:53,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 854 transitions. [2021-06-12 22:34:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:53,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:53,075 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:53,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:34:53,276 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1886028755, now seen corresponding path program 34 times [2021-06-12 22:34:53,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:53,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220300305] [2021-06-12 22:34:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:53,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220300305] [2021-06-12 22:34:53,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220300305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:53,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237044709] [2021-06-12 22:34:53,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:53,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:53,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:53,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:53,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:53,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237044709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:53,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:53,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:53,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229516126] [2021-06-12 22:34:53,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:53,559 INFO L87 Difference]: Start difference. First operand 357 states and 854 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:53,811 INFO L93 Difference]: Finished difference Result 410 states and 952 transitions. [2021-06-12 22:34:53,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:34:53,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:53,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:53,813 INFO L225 Difference]: With dead ends: 410 [2021-06-12 22:34:53,813 INFO L226 Difference]: Without dead ends: 394 [2021-06-12 22:34:53,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:34:53,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-12 22:34:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 359. [2021-06-12 22:34:53,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.393854748603352) internal successors, (857), 358 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 857 transitions. [2021-06-12 22:34:53,817 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 857 transitions. Word has length 19 [2021-06-12 22:34:53,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:53,817 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 857 transitions. [2021-06-12 22:34:53,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:53,818 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 857 transitions. [2021-06-12 22:34:53,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:53,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:53,819 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:54,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:34:54,041 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1752716457, now seen corresponding path program 35 times [2021-06-12 22:34:54,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:54,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755338801] [2021-06-12 22:34:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:54,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755338801] [2021-06-12 22:34:54,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755338801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:54,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225712501] [2021-06-12 22:34:54,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:54,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:34:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:54,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225712501] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:34:54,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:34:54,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:34:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278632160] [2021-06-12 22:34:54,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:34:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:34:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:54,277 INFO L87 Difference]: Start difference. First operand 359 states and 857 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:54,341 INFO L93 Difference]: Finished difference Result 398 states and 924 transitions. [2021-06-12 22:34:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:34:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:54,342 INFO L225 Difference]: With dead ends: 398 [2021-06-12 22:34:54,342 INFO L226 Difference]: Without dead ends: 386 [2021-06-12 22:34:54,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-12 22:34:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 354. [2021-06-12 22:34:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.405099150141643) internal successors, (849), 353 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 849 transitions. [2021-06-12 22:34:54,351 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 849 transitions. Word has length 19 [2021-06-12 22:34:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:54,351 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 849 transitions. [2021-06-12 22:34:54,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 849 transitions. [2021-06-12 22:34:54,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:54,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:54,352 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:54,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:54,569 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:54,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1532889265, now seen corresponding path program 36 times [2021-06-12 22:34:54,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:54,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641250740] [2021-06-12 22:34:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:54,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641250740] [2021-06-12 22:34:54,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641250740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:54,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050455222] [2021-06-12 22:34:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:54,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:34:54,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:54,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050455222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:54,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:54,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:54,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176145786] [2021-06-12 22:34:54,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:54,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:54,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:54,817 INFO L87 Difference]: Start difference. First operand 354 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:55,394 INFO L93 Difference]: Finished difference Result 601 states and 1374 transitions. [2021-06-12 22:34:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:34:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:55,395 INFO L225 Difference]: With dead ends: 601 [2021-06-12 22:34:55,395 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 22:34:55,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 503.0ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:34:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 22:34:55,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 398. [2021-06-12 22:34:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.4005037783375314) internal successors, (953), 397 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 953 transitions. [2021-06-12 22:34:55,401 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 953 transitions. Word has length 19 [2021-06-12 22:34:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:55,401 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 953 transitions. [2021-06-12 22:34:55,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:55,401 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 953 transitions. [2021-06-12 22:34:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:55,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:55,402 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:55,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 22:34:55,617 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -471317365, now seen corresponding path program 37 times [2021-06-12 22:34:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:55,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6321912] [2021-06-12 22:34:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:55,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6321912] [2021-06-12 22:34:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6321912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:55,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076377800] [2021-06-12 22:34:55,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:55,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:55,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:55,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076377800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:55,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:55,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:55,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244118345] [2021-06-12 22:34:55,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:55,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:55,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:55,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:55,845 INFO L87 Difference]: Start difference. First operand 398 states and 953 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:56,025 INFO L93 Difference]: Finished difference Result 435 states and 1013 transitions. [2021-06-12 22:34:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:34:56,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:56,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:56,027 INFO L225 Difference]: With dead ends: 435 [2021-06-12 22:34:56,027 INFO L226 Difference]: Without dead ends: 416 [2021-06-12 22:34:56,027 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:34:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-12 22:34:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 398. [2021-06-12 22:34:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.395465994962217) internal successors, (951), 397 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 951 transitions. [2021-06-12 22:34:56,035 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 951 transitions. Word has length 19 [2021-06-12 22:34:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:56,035 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 951 transitions. [2021-06-12 22:34:56,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 951 transitions. [2021-06-12 22:34:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:56,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:56,036 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:56,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:56,258 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:56,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1274029861, now seen corresponding path program 38 times [2021-06-12 22:34:56,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:56,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225947997] [2021-06-12 22:34:56,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:56,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225947997] [2021-06-12 22:34:56,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225947997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:56,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67543988] [2021-06-12 22:34:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:56,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:34:56,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:56,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:56,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:56,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67543988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:56,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:56,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:56,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751249996] [2021-06-12 22:34:56,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:56,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:56,553 INFO L87 Difference]: Start difference. First operand 398 states and 951 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:56,929 INFO L93 Difference]: Finished difference Result 532 states and 1221 transitions. [2021-06-12 22:34:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:34:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:56,931 INFO L225 Difference]: With dead ends: 532 [2021-06-12 22:34:56,931 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 22:34:56,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:34:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 22:34:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 397. [2021-06-12 22:34:56,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.3914141414141414) internal successors, (947), 396 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 947 transitions. [2021-06-12 22:34:56,936 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 947 transitions. Word has length 19 [2021-06-12 22:34:56,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:56,936 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 947 transitions. [2021-06-12 22:34:56,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 947 transitions. [2021-06-12 22:34:56,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:56,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:56,938 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:57,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 22:34:57,153 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1464333983, now seen corresponding path program 39 times [2021-06-12 22:34:57,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:57,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707158980] [2021-06-12 22:34:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:57,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707158980] [2021-06-12 22:34:57,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707158980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548729793] [2021-06-12 22:34:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:57,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:34:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:57,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:57,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548729793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:57,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:57,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:57,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960814405] [2021-06-12 22:34:57,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:57,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:57,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:57,408 INFO L87 Difference]: Start difference. First operand 397 states and 947 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:57,820 INFO L93 Difference]: Finished difference Result 528 states and 1212 transitions. [2021-06-12 22:34:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:34:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:57,822 INFO L225 Difference]: With dead ends: 528 [2021-06-12 22:34:57,822 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 22:34:57,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:34:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 22:34:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 401. [2021-06-12 22:34:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.385) internal successors, (954), 400 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 954 transitions. [2021-06-12 22:34:57,827 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 954 transitions. Word has length 19 [2021-06-12 22:34:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:57,827 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 954 transitions. [2021-06-12 22:34:57,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 954 transitions. [2021-06-12 22:34:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:57,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:57,828 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:58,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:58,028 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash 389426617, now seen corresponding path program 40 times [2021-06-12 22:34:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:58,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889007592] [2021-06-12 22:34:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:58,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889007592] [2021-06-12 22:34:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889007592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:58,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209185415] [2021-06-12 22:34:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:58,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:34:58,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:34:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:58,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209185415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:58,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:58,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:58,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069541848] [2021-06-12 22:34:58,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:58,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:58,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:58,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:58,270 INFO L87 Difference]: Start difference. First operand 401 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:58,644 INFO L93 Difference]: Finished difference Result 457 states and 1041 transitions. [2021-06-12 22:34:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:34:58,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:58,646 INFO L225 Difference]: With dead ends: 457 [2021-06-12 22:34:58,647 INFO L226 Difference]: Without dead ends: 440 [2021-06-12 22:34:58,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:34:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-12 22:34:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 402. [2021-06-12 22:34:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.374064837905237) internal successors, (952), 401 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 952 transitions. [2021-06-12 22:34:58,653 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 952 transitions. Word has length 19 [2021-06-12 22:34:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:58,653 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 952 transitions. [2021-06-12 22:34:58,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 952 transitions. [2021-06-12 22:34:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:58,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:58,654 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:58,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:58,854 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:58,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1430558513, now seen corresponding path program 41 times [2021-06-12 22:34:58,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:58,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422860882] [2021-06-12 22:34:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:58,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422860882] [2021-06-12 22:34:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422860882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:58,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306958592] [2021-06-12 22:34:58,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:58,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:34:58,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:34:58,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:59,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306958592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:59,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:59,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:34:59,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521399537] [2021-06-12 22:34:59,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:34:59,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:34:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:34:59,067 INFO L87 Difference]: Start difference. First operand 402 states and 952 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:59,265 INFO L93 Difference]: Finished difference Result 474 states and 1095 transitions. [2021-06-12 22:34:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:59,267 INFO L225 Difference]: With dead ends: 474 [2021-06-12 22:34:59,267 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 22:34:59,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:34:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 22:34:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 395. [2021-06-12 22:34:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.3756345177664975) internal successors, (936), 394 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 936 transitions. [2021-06-12 22:34:59,273 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 936 transitions. Word has length 19 [2021-06-12 22:34:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:59,273 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 936 transitions. [2021-06-12 22:34:59,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 936 transitions. [2021-06-12 22:34:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:59,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:59,274 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:34:59,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-12 22:34:59,497 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:34:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:34:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash 11172077, now seen corresponding path program 42 times [2021-06-12 22:34:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:34:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321756295] [2021-06-12 22:34:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:34:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:34:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:59,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:34:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321756295] [2021-06-12 22:34:59,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321756295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592125013] [2021-06-12 22:34:59,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:34:59,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:34:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:34:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:34:59,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:34:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:34:59,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592125013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:34:59,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:34:59,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:34:59,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640404932] [2021-06-12 22:34:59,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:34:59,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:34:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:34:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:34:59,761 INFO L87 Difference]: Start difference. First operand 395 states and 936 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:34:59,975 INFO L93 Difference]: Finished difference Result 505 states and 1159 transitions. [2021-06-12 22:34:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:34:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:34:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:34:59,977 INFO L225 Difference]: With dead ends: 505 [2021-06-12 22:34:59,977 INFO L226 Difference]: Without dead ends: 492 [2021-06-12 22:34:59,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:34:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-12 22:34:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 414. [2021-06-12 22:34:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.375302663438257) internal successors, (981), 413 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 981 transitions. [2021-06-12 22:34:59,982 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 981 transitions. Word has length 19 [2021-06-12 22:34:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:34:59,982 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 981 transitions. [2021-06-12 22:34:59,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:34:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 981 transitions. [2021-06-12 22:34:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:34:59,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:34:59,983 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:00,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:00,189 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash 735553785, now seen corresponding path program 43 times [2021-06-12 22:35:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:00,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922269390] [2021-06-12 22:35:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:00,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922269390] [2021-06-12 22:35:00,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922269390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:00,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349197925] [2021-06-12 22:35:00,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:00,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349197925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:00,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:00,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855486166] [2021-06-12 22:35:00,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:00,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:00,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:00,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:00,431 INFO L87 Difference]: Start difference. First operand 414 states and 981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:00,632 INFO L93 Difference]: Finished difference Result 489 states and 1127 transitions. [2021-06-12 22:35:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:35:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:00,634 INFO L225 Difference]: With dead ends: 489 [2021-06-12 22:35:00,634 INFO L226 Difference]: Without dead ends: 469 [2021-06-12 22:35:00,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:35:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-12 22:35:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2021-06-12 22:35:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.3755760368663594) internal successors, (1031), 434 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1031 transitions. [2021-06-12 22:35:00,640 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1031 transitions. Word has length 19 [2021-06-12 22:35:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:00,640 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1031 transitions. [2021-06-12 22:35:00,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1031 transitions. [2021-06-12 22:35:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:00,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:00,641 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:00,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 22:35:00,841 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash 589063373, now seen corresponding path program 44 times [2021-06-12 22:35:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:00,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230751558] [2021-06-12 22:35:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:00,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:00,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230751558] [2021-06-12 22:35:00,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230751558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:00,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902751262] [2021-06-12 22:35:00,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:00,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:01,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902751262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:01,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:01,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211986226] [2021-06-12 22:35:01,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:01,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:01,073 INFO L87 Difference]: Start difference. First operand 435 states and 1031 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:01,322 INFO L93 Difference]: Finished difference Result 623 states and 1481 transitions. [2021-06-12 22:35:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:35:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:01,324 INFO L225 Difference]: With dead ends: 623 [2021-06-12 22:35:01,324 INFO L226 Difference]: Without dead ends: 609 [2021-06-12 22:35:01,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:35:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-06-12 22:35:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 521. [2021-06-12 22:35:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.4288461538461537) internal successors, (1263), 520 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1263 transitions. [2021-06-12 22:35:01,329 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1263 transitions. Word has length 19 [2021-06-12 22:35:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:01,329 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1263 transitions. [2021-06-12 22:35:01,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1263 transitions. [2021-06-12 22:35:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:01,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:01,330 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:01,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:01,531 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:01,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:01,531 INFO L82 PathProgramCache]: Analyzing trace with hash -737202913, now seen corresponding path program 45 times [2021-06-12 22:35:01,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:01,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236136379] [2021-06-12 22:35:01,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:01,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:01,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236136379] [2021-06-12 22:35:01,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236136379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:01,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996292578] [2021-06-12 22:35:01,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:01,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:35:01,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:01,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:01,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996292578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:01,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:01,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:01,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501441117] [2021-06-12 22:35:01,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:01,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:01,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:01,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:01,799 INFO L87 Difference]: Start difference. First operand 521 states and 1263 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:02,066 INFO L93 Difference]: Finished difference Result 570 states and 1340 transitions. [2021-06-12 22:35:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:35:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:02,068 INFO L225 Difference]: With dead ends: 570 [2021-06-12 22:35:02,068 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 22:35:02,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:35:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 22:35:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 480. [2021-06-12 22:35:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-06-12 22:35:02,074 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 19 [2021-06-12 22:35:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:02,074 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-06-12 22:35:02,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-06-12 22:35:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:02,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:02,075 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:02,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 22:35:02,288 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:02,288 INFO L82 PathProgramCache]: Analyzing trace with hash -67158711, now seen corresponding path program 46 times [2021-06-12 22:35:02,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:02,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794774233] [2021-06-12 22:35:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:02,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:02,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794774233] [2021-06-12 22:35:02,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794774233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:02,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724341276] [2021-06-12 22:35:02,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:02,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:02,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:35:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:02,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724341276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:02,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:02,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:35:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805620475] [2021-06-12 22:35:02,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:35:02,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:35:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:02,532 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:03,019 INFO L93 Difference]: Finished difference Result 737 states and 1672 transitions. [2021-06-12 22:35:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:35:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:03,021 INFO L225 Difference]: With dead ends: 737 [2021-06-12 22:35:03,021 INFO L226 Difference]: Without dead ends: 718 [2021-06-12 22:35:03,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:35:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-12 22:35:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 533. [2021-06-12 22:35:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.3477443609022557) internal successors, (1249), 532 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1249 transitions. [2021-06-12 22:35:03,028 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1249 transitions. Word has length 19 [2021-06-12 22:35:03,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:03,028 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1249 transitions. [2021-06-12 22:35:03,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1249 transitions. [2021-06-12 22:35:03,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:03,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:03,029 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:03,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 22:35:03,237 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 338508243, now seen corresponding path program 47 times [2021-06-12 22:35:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211223033] [2021-06-12 22:35:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:03,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:03,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211223033] [2021-06-12 22:35:03,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211223033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:03,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558709414] [2021-06-12 22:35:03,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:03,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:03,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:03,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558709414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:03,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:35:03,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:35:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304042168] [2021-06-12 22:35:03,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:35:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:35:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:03,508 INFO L87 Difference]: Start difference. First operand 533 states and 1249 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:03,645 INFO L93 Difference]: Finished difference Result 675 states and 1555 transitions. [2021-06-12 22:35:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:35:03,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:03,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:03,648 INFO L225 Difference]: With dead ends: 675 [2021-06-12 22:35:03,648 INFO L226 Difference]: Without dead ends: 660 [2021-06-12 22:35:03,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:35:03,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-12 22:35:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 390. [2021-06-12 22:35:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3059125964010283) internal successors, (897), 389 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 897 transitions. [2021-06-12 22:35:03,652 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 897 transitions. Word has length 19 [2021-06-12 22:35:03,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:03,652 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 897 transitions. [2021-06-12 22:35:03,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:03,652 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 897 transitions. [2021-06-12 22:35:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:03,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:03,653 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:03,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:03,857 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:03,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1596297767, now seen corresponding path program 48 times [2021-06-12 22:35:03,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:03,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012087426] [2021-06-12 22:35:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:03,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012087426] [2021-06-12 22:35:03,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012087426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621024909] [2021-06-12 22:35:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:03,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:35:03,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:04,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621024909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:04,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:04,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:04,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123246767] [2021-06-12 22:35:04,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:04,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:04,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:04,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:04,124 INFO L87 Difference]: Start difference. First operand 390 states and 897 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:04,723 INFO L93 Difference]: Finished difference Result 552 states and 1225 transitions. [2021-06-12 22:35:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:35:04,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:04,725 INFO L225 Difference]: With dead ends: 552 [2021-06-12 22:35:04,725 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 22:35:04,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:35:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 22:35:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 431. [2021-06-12 22:35:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3232558139534882) internal successors, (999), 430 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 999 transitions. [2021-06-12 22:35:04,733 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 999 transitions. Word has length 19 [2021-06-12 22:35:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:04,733 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 999 transitions. [2021-06-12 22:35:04,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 999 transitions. [2021-06-12 22:35:04,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:04,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:04,734 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:04,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:35:04,941 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1320337189, now seen corresponding path program 49 times [2021-06-12 22:35:04,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:04,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435128837] [2021-06-12 22:35:04,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:05,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:05,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435128837] [2021-06-12 22:35:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435128837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:05,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978115276] [2021-06-12 22:35:05,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:05,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978115276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:05,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:05,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127941258] [2021-06-12 22:35:05,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:05,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:05,173 INFO L87 Difference]: Start difference. First operand 431 states and 999 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:05,373 INFO L93 Difference]: Finished difference Result 490 states and 1117 transitions. [2021-06-12 22:35:05,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:35:05,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:05,375 INFO L225 Difference]: With dead ends: 490 [2021-06-12 22:35:05,375 INFO L226 Difference]: Without dead ends: 476 [2021-06-12 22:35:05,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:35:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-12 22:35:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-12 22:35:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.278481012658228) internal successors, (900), 395 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 900 transitions. [2021-06-12 22:35:05,381 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 900 transitions. Word has length 19 [2021-06-12 22:35:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:05,381 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 900 transitions. [2021-06-12 22:35:05,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 900 transitions. [2021-06-12 22:35:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:05,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:05,382 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:05,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:05,583 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1648363821, now seen corresponding path program 50 times [2021-06-12 22:35:05,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:05,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418455369] [2021-06-12 22:35:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:05,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418455369] [2021-06-12 22:35:05,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418455369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:05,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603062244] [2021-06-12 22:35:05,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:05,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:05,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:05,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603062244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:05,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:05,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:05,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682943166] [2021-06-12 22:35:05,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:05,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:05,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:05,869 INFO L87 Difference]: Start difference. First operand 396 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:06,104 INFO L93 Difference]: Finished difference Result 448 states and 1001 transitions. [2021-06-12 22:35:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:35:06,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:06,105 INFO L225 Difference]: With dead ends: 448 [2021-06-12 22:35:06,105 INFO L226 Difference]: Without dead ends: 434 [2021-06-12 22:35:06,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 324.1ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:35:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-12 22:35:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-12 22:35:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.197986577181208) internal successors, (655), 298 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 655 transitions. [2021-06-12 22:35:06,110 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 655 transitions. Word has length 19 [2021-06-12 22:35:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:06,110 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 655 transitions. [2021-06-12 22:35:06,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 655 transitions. [2021-06-12 22:35:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:06,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:06,111 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:06,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:06,317 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1976559273, now seen corresponding path program 51 times [2021-06-12 22:35:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:06,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494143877] [2021-06-12 22:35:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:06,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494143877] [2021-06-12 22:35:06,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494143877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502399525] [2021-06-12 22:35:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:06,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:35:06,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:06,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502399525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:06,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:06,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:06,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411242041] [2021-06-12 22:35:06,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:06,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:06,581 INFO L87 Difference]: Start difference. First operand 299 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:06,790 INFO L93 Difference]: Finished difference Result 337 states and 722 transitions. [2021-06-12 22:35:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:35:06,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:06,791 INFO L225 Difference]: With dead ends: 337 [2021-06-12 22:35:06,791 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 22:35:06,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 277.5ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:35:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 22:35:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 297. [2021-06-12 22:35:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.195945945945946) internal successors, (650), 296 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 650 transitions. [2021-06-12 22:35:06,795 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 650 transitions. Word has length 19 [2021-06-12 22:35:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:06,796 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 650 transitions. [2021-06-12 22:35:06,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 650 transitions. [2021-06-12 22:35:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:06,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:06,796 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:07,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:07,013 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash -900848117, now seen corresponding path program 52 times [2021-06-12 22:35:07,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:07,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032338547] [2021-06-12 22:35:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:07,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032338547] [2021-06-12 22:35:07,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032338547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:07,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118767697] [2021-06-12 22:35:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:07,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:07,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:35:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:07,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118767697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:07,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:07,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:35:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273343564] [2021-06-12 22:35:07,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:35:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:07,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:35:07,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:07,246 INFO L87 Difference]: Start difference. First operand 297 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:08,040 INFO L93 Difference]: Finished difference Result 546 states and 1150 transitions. [2021-06-12 22:35:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:35:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:08,041 INFO L225 Difference]: With dead ends: 546 [2021-06-12 22:35:08,041 INFO L226 Difference]: Without dead ends: 527 [2021-06-12 22:35:08,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 726.4ms TimeCoverageRelationStatistics Valid=624, Invalid=2238, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:35:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-12 22:35:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 330. [2021-06-12 22:35:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2036474164133737) internal successors, (725), 329 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 725 transitions. [2021-06-12 22:35:08,045 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 725 transitions. Word has length 19 [2021-06-12 22:35:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:08,045 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 725 transitions. [2021-06-12 22:35:08,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 725 transitions. [2021-06-12 22:35:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:08,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:08,046 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:08,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:08,246 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:08,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:08,247 INFO L82 PathProgramCache]: Analyzing trace with hash -258765289, now seen corresponding path program 53 times [2021-06-12 22:35:08,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:08,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096325636] [2021-06-12 22:35:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:08,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096325636] [2021-06-12 22:35:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096325636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:08,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728598193] [2021-06-12 22:35:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:08,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:08,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:08,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:08,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728598193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:08,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:08,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:08,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579090635] [2021-06-12 22:35:08,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:08,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:08,492 INFO L87 Difference]: Start difference. First operand 330 states and 725 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:08,682 INFO L93 Difference]: Finished difference Result 370 states and 790 transitions. [2021-06-12 22:35:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:35:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:08,682 INFO L225 Difference]: With dead ends: 370 [2021-06-12 22:35:08,682 INFO L226 Difference]: Without dead ends: 349 [2021-06-12 22:35:08,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:35:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-12 22:35:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 301. [2021-06-12 22:35:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.183333333333333) internal successors, (655), 300 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 655 transitions. [2021-06-12 22:35:08,686 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 655 transitions. Word has length 19 [2021-06-12 22:35:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:08,686 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 655 transitions. [2021-06-12 22:35:08,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 655 transitions. [2021-06-12 22:35:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:08,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:08,687 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:08,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:08,911 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash -385810339, now seen corresponding path program 54 times [2021-06-12 22:35:08,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:08,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196917122] [2021-06-12 22:35:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:09,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196917122] [2021-06-12 22:35:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196917122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189857193] [2021-06-12 22:35:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:35:09,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:35:09,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:09,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189857193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:09,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:09,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:09,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439826043] [2021-06-12 22:35:09,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:09,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:09,221 INFO L87 Difference]: Start difference. First operand 301 states and 655 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:09,504 INFO L93 Difference]: Finished difference Result 354 states and 743 transitions. [2021-06-12 22:35:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:35:09,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:09,505 INFO L225 Difference]: With dead ends: 354 [2021-06-12 22:35:09,505 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 22:35:09,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:35:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 22:35:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2021-06-12 22:35:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.1824324324324325) internal successors, (646), 296 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 646 transitions. [2021-06-12 22:35:09,510 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 646 transitions. Word has length 19 [2021-06-12 22:35:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 646 transitions. [2021-06-12 22:35:09,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 646 transitions. [2021-06-12 22:35:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:09,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:09,511 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:09,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:09,721 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash 529271149, now seen corresponding path program 55 times [2021-06-12 22:35:09,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:09,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314512684] [2021-06-12 22:35:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:09,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314512684] [2021-06-12 22:35:09,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314512684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:09,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837898368] [2021-06-12 22:35:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837898368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:09,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:09,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:09,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372004118] [2021-06-12 22:35:09,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:09,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:09,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:09,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:09,988 INFO L87 Difference]: Start difference. First operand 297 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:10,150 INFO L93 Difference]: Finished difference Result 323 states and 685 transitions. [2021-06-12 22:35:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:35:10,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:10,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:10,151 INFO L225 Difference]: With dead ends: 323 [2021-06-12 22:35:10,151 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 22:35:10,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:10,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 22:35:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 275. [2021-06-12 22:35:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1824817518248176) internal successors, (598), 274 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 598 transitions. [2021-06-12 22:35:10,154 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 598 transitions. Word has length 19 [2021-06-12 22:35:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:10,154 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 598 transitions. [2021-06-12 22:35:10,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 598 transitions. [2021-06-12 22:35:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:10,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:10,155 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:10,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 22:35:10,355 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1199315351, now seen corresponding path program 56 times [2021-06-12 22:35:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:10,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30375313] [2021-06-12 22:35:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:10,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30375313] [2021-06-12 22:35:10,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30375313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:10,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525559068] [2021-06-12 22:35:10,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:10,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:10,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:10,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525559068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:10,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:10,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119109769] [2021-06-12 22:35:10,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:10,638 INFO L87 Difference]: Start difference. First operand 275 states and 598 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:10,831 INFO L93 Difference]: Finished difference Result 299 states and 633 transitions. [2021-06-12 22:35:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:35:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:10,832 INFO L225 Difference]: With dead ends: 299 [2021-06-12 22:35:10,832 INFO L226 Difference]: Without dead ends: 289 [2021-06-12 22:35:10,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-12 22:35:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 261. [2021-06-12 22:35:10,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1846153846153844) internal successors, (568), 260 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 568 transitions. [2021-06-12 22:35:10,836 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 568 transitions. Word has length 19 [2021-06-12 22:35:10,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:10,836 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 568 transitions. [2021-06-12 22:35:10,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 568 transitions. [2021-06-12 22:35:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:10,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:10,837 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:11,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:11,053 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1432999257, now seen corresponding path program 57 times [2021-06-12 22:35:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:11,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386594927] [2021-06-12 22:35:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:11,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386594927] [2021-06-12 22:35:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386594927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:11,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952184503] [2021-06-12 22:35:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:35:11,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:35:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:11,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952184503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:11,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:11,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:35:11,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106086885] [2021-06-12 22:35:11,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:35:11,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:35:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:35:11,350 INFO L87 Difference]: Start difference. First operand 261 states and 568 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:11,546 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-12 22:35:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:35:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:11,547 INFO L225 Difference]: With dead ends: 282 [2021-06-12 22:35:11,547 INFO L226 Difference]: Without dead ends: 273 [2021-06-12 22:35:11,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-12 22:35:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-06-12 22:35:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-12 22:35:11,551 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-12 22:35:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:11,551 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-12 22:35:11,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-12 22:35:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:11,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:11,552 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:11,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 22:35:11,753 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:11,753 INFO L82 PathProgramCache]: Analyzing trace with hash -265385941, now seen corresponding path program 58 times [2021-06-12 22:35:11,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:11,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102662207] [2021-06-12 22:35:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:11,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102662207] [2021-06-12 22:35:11,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102662207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858032861] [2021-06-12 22:35:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:11,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:11,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:11,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:35:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:12,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858032861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:12,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:12,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 22:35:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243802486] [2021-06-12 22:35:12,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:35:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:35:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:12,022 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:12,425 INFO L93 Difference]: Finished difference Result 319 states and 675 transitions. [2021-06-12 22:35:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:35:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:12,426 INFO L225 Difference]: With dead ends: 319 [2021-06-12 22:35:12,426 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 22:35:12,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:35:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 22:35:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-12 22:35:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.187250996015936) internal successors, (549), 251 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 549 transitions. [2021-06-12 22:35:12,429 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 549 transitions. Word has length 19 [2021-06-12 22:35:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:12,429 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 549 transitions. [2021-06-12 22:35:12,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 549 transitions. [2021-06-12 22:35:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:12,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:12,430 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:12,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:12,630 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1815085655, now seen corresponding path program 59 times [2021-06-12 22:35:12,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:12,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17543073] [2021-06-12 22:35:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:12,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17543073] [2021-06-12 22:35:12,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17543073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:12,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470145168] [2021-06-12 22:35:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:35:12,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:12,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:12,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470145168] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:12,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:35:12,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 18 [2021-06-12 22:35:12,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294982992] [2021-06-12 22:35:12,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:35:12,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:35:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:12,903 INFO L87 Difference]: Start difference. First operand 252 states and 549 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:12,961 INFO L93 Difference]: Finished difference Result 264 states and 566 transitions. [2021-06-12 22:35:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:35:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:35:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:12,961 INFO L225 Difference]: With dead ends: 264 [2021-06-12 22:35:12,962 INFO L226 Difference]: Without dead ends: 198 [2021-06-12 22:35:12,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:35:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-12 22:35:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2021-06-12 22:35:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.6764705882352942) internal successors, (285), 170 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 285 transitions. [2021-06-12 22:35:12,967 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 285 transitions. Word has length 19 [2021-06-12 22:35:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:12,967 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 285 transitions. [2021-06-12 22:35:12,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 285 transitions. [2021-06-12 22:35:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:12,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:12,968 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:13,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,191 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:13,191 INFO L82 PathProgramCache]: Analyzing trace with hash -477505781, now seen corresponding path program 60 times [2021-06-12 22:35:13,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:13,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451229872] [2021-06-12 22:35:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:13,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:13,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451229872] [2021-06-12 22:35:13,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451229872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:13,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168833714] [2021-06-12 22:35:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:35:13,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:35:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:13,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168833714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:13,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:13,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:35:13,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047648986] [2021-06-12 22:35:13,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:35:13,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:35:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:35:13,266 INFO L87 Difference]: Start difference. First operand 171 states and 285 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:13,334 INFO L93 Difference]: Finished difference Result 213 states and 345 transitions. [2021-06-12 22:35:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:35:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:13,335 INFO L225 Difference]: With dead ends: 213 [2021-06-12 22:35:13,335 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 22:35:13,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:35:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 22:35:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-06-12 22:35:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-12 22:35:13,337 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 21 [2021-06-12 22:35:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:13,337 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-12 22:35:13,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-12 22:35:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:13,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:13,337 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:13,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,538 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:13,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:13,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1317377295, now seen corresponding path program 61 times [2021-06-12 22:35:13,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:13,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428899823] [2021-06-12 22:35:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:13,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:13,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428899823] [2021-06-12 22:35:13,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428899823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:13,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635076545] [2021-06-12 22:35:13,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 22:35:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:13,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635076545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:13,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:13,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:35:13,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703310217] [2021-06-12 22:35:13,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:13,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:13,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:13,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:13,607 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:13,679 INFO L93 Difference]: Finished difference Result 199 states and 319 transitions. [2021-06-12 22:35:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:35:13,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:13,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:13,680 INFO L225 Difference]: With dead ends: 199 [2021-06-12 22:35:13,680 INFO L226 Difference]: Without dead ends: 184 [2021-06-12 22:35:13,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:35:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-12 22:35:13,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 155. [2021-06-12 22:35:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-12 22:35:13,682 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-12 22:35:13,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:13,682 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-12 22:35:13,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:13,682 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-12 22:35:13,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:13,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:13,682 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:13,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,883 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash -25018099, now seen corresponding path program 62 times [2021-06-12 22:35:13,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:13,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901788498] [2021-06-12 22:35:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:13,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:13,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901788498] [2021-06-12 22:35:13,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901788498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:13,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422954390] [2021-06-12 22:35:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:35:13,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:14,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422954390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:14,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:14,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-12 22:35:14,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501395997] [2021-06-12 22:35:14,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:35:14,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:35:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:35:14,036 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:14,283 INFO L93 Difference]: Finished difference Result 190 states and 305 transitions. [2021-06-12 22:35:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:35:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:14,283 INFO L225 Difference]: With dead ends: 190 [2021-06-12 22:35:14,284 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 22:35:14,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:35:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 22:35:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-06-12 22:35:14,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 154 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:14,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 259 transitions. [2021-06-12 22:35:14,285 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 259 transitions. Word has length 21 [2021-06-12 22:35:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:14,286 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 259 transitions. [2021-06-12 22:35:14,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:14,286 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 259 transitions. [2021-06-12 22:35:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:14,286 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:14,286 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:14,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-12 22:35:14,486 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash -856436821, now seen corresponding path program 63 times [2021-06-12 22:35:14,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:14,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336116304] [2021-06-12 22:35:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:14,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:14,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336116304] [2021-06-12 22:35:14,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336116304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:14,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680945485] [2021-06-12 22:35:14,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:14,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:35:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680945485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:14,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:14,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2021-06-12 22:35:14,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268995507] [2021-06-12 22:35:14,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:35:14,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:35:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:35:14,675 INFO L87 Difference]: Start difference. First operand 155 states and 259 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:15,180 INFO L93 Difference]: Finished difference Result 203 states and 330 transitions. [2021-06-12 22:35:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:35:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:15,181 INFO L225 Difference]: With dead ends: 203 [2021-06-12 22:35:15,181 INFO L226 Difference]: Without dead ends: 187 [2021-06-12 22:35:15,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=368, Invalid=1272, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:35:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-12 22:35:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-06-12 22:35:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.6875) internal successors, (243), 144 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 243 transitions. [2021-06-12 22:35:15,183 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 243 transitions. Word has length 21 [2021-06-12 22:35:15,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:15,183 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 243 transitions. [2021-06-12 22:35:15,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 243 transitions. [2021-06-12 22:35:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:15,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:15,184 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:15,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:15,384 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:15,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1784149655, now seen corresponding path program 64 times [2021-06-12 22:35:15,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:15,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655610142] [2021-06-12 22:35:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:15,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655610142] [2021-06-12 22:35:15,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655610142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:15,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467707511] [2021-06-12 22:35:15,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:15,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:15,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:15,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:35:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467707511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:35:15,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121710289] [2021-06-12 22:35:15,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:35:15,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:35:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:15,670 INFO L87 Difference]: Start difference. First operand 145 states and 243 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:16,079 INFO L93 Difference]: Finished difference Result 244 states and 400 transitions. [2021-06-12 22:35:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:35:16,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:16,080 INFO L225 Difference]: With dead ends: 244 [2021-06-12 22:35:16,080 INFO L226 Difference]: Without dead ends: 218 [2021-06-12 22:35:16,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 476.9ms TimeCoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:35:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-06-12 22:35:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-06-12 22:35:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.6686746987951808) internal successors, (277), 166 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 277 transitions. [2021-06-12 22:35:16,083 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 277 transitions. Word has length 23 [2021-06-12 22:35:16,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:16,083 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 277 transitions. [2021-06-12 22:35:16,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,083 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 277 transitions. [2021-06-12 22:35:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:16,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:16,083 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:16,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:16,289 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2003485607, now seen corresponding path program 65 times [2021-06-12 22:35:16,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:16,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097925633] [2021-06-12 22:35:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:16,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097925633] [2021-06-12 22:35:16,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097925633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389106828] [2021-06-12 22:35:16,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:16,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:35:16,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:16,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:16,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:35:16,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389106828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:16,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:16,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-12 22:35:16,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068988532] [2021-06-12 22:35:16,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:35:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:35:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:35:16,556 INFO L87 Difference]: Start difference. First operand 167 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:16,960 INFO L93 Difference]: Finished difference Result 206 states and 330 transitions. [2021-06-12 22:35:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:35:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:16,961 INFO L225 Difference]: With dead ends: 206 [2021-06-12 22:35:16,961 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 22:35:16,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:35:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 22:35:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-12 22:35:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.6312056737588652) internal successors, (230), 141 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 230 transitions. [2021-06-12 22:35:16,962 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 230 transitions. Word has length 23 [2021-06-12 22:35:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:16,962 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 230 transitions. [2021-06-12 22:35:16,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:16,963 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 230 transitions. [2021-06-12 22:35:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:16,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:16,963 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:17,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 22:35:17,164 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash 677219321, now seen corresponding path program 66 times [2021-06-12 22:35:17,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:17,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294438677] [2021-06-12 22:35:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:17,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:17,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294438677] [2021-06-12 22:35:17,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294438677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:17,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769446121] [2021-06-12 22:35:17,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:17,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:35:17,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:17,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:35:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:17,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769446121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:17,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:17,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:35:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734495942] [2021-06-12 22:35:17,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:35:17,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:17,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:35:17,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:17,495 INFO L87 Difference]: Start difference. First operand 142 states and 230 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:17,915 INFO L93 Difference]: Finished difference Result 182 states and 286 transitions. [2021-06-12 22:35:17,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:35:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:17,915 INFO L225 Difference]: With dead ends: 182 [2021-06-12 22:35:17,915 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 22:35:17,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:35:17,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 22:35:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 117. [2021-06-12 22:35:17,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.6120689655172413) internal successors, (187), 116 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 187 transitions. [2021-06-12 22:35:17,918 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 187 transitions. Word has length 23 [2021-06-12 22:35:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:17,918 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 187 transitions. [2021-06-12 22:35:17,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 187 transitions. [2021-06-12 22:35:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:17,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:17,918 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:18,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:18,121 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1752930477, now seen corresponding path program 67 times [2021-06-12 22:35:18,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:18,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774789642] [2021-06-12 22:35:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:18,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774789642] [2021-06-12 22:35:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774789642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223030308] [2021-06-12 22:35:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:18,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:35:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:18,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223030308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:18,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:18,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:35:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957684924] [2021-06-12 22:35:18,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:35:18,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:35:18,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:18,514 INFO L87 Difference]: Start difference. First operand 117 states and 187 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:18,889 INFO L93 Difference]: Finished difference Result 147 states and 230 transitions. [2021-06-12 22:35:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:35:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:18,890 INFO L225 Difference]: With dead ends: 147 [2021-06-12 22:35:18,890 INFO L226 Difference]: Without dead ends: 92 [2021-06-12 22:35:18,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:35:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-12 22:35:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2021-06-12 22:35:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 84 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 127 transitions. [2021-06-12 22:35:18,891 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 127 transitions. Word has length 23 [2021-06-12 22:35:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:18,891 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 127 transitions. [2021-06-12 22:35:18,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 127 transitions. [2021-06-12 22:35:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:18,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:18,892 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:19,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 22:35:19,109 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1920453071, now seen corresponding path program 68 times [2021-06-12 22:35:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:19,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099569404] [2021-06-12 22:35:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:19,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099569404] [2021-06-12 22:35:19,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099569404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:19,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729527241] [2021-06-12 22:35:19,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:19,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:35:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:19,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729527241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:19,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:19,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:35:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140206145] [2021-06-12 22:35:19,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:35:19,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:19,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:35:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:19,497 INFO L87 Difference]: Start difference. First operand 85 states and 127 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:19,866 INFO L93 Difference]: Finished difference Result 117 states and 172 transitions. [2021-06-12 22:35:19,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:35:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:19,867 INFO L225 Difference]: With dead ends: 117 [2021-06-12 22:35:19,867 INFO L226 Difference]: Without dead ends: 99 [2021-06-12 22:35:19,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:35:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-12 22:35:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-06-12 22:35:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 84 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 125 transitions. [2021-06-12 22:35:19,869 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 125 transitions. Word has length 23 [2021-06-12 22:35:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:19,869 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 125 transitions. [2021-06-12 22:35:19,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 125 transitions. [2021-06-12 22:35:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:19,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:19,869 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:20,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 22:35:20,070 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash 827116973, now seen corresponding path program 69 times [2021-06-12 22:35:20,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:20,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603379378] [2021-06-12 22:35:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:20,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603379378] [2021-06-12 22:35:20,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603379378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:20,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457257571] [2021-06-12 22:35:20,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:20,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:35:20,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:20,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457257571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:20,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:20,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-12 22:35:20,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977687201] [2021-06-12 22:35:20,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:35:20,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:20,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:35:20,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:35:20,351 INFO L87 Difference]: Start difference. First operand 85 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:20,694 INFO L93 Difference]: Finished difference Result 111 states and 161 transitions. [2021-06-12 22:35:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:35:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:20,695 INFO L225 Difference]: With dead ends: 111 [2021-06-12 22:35:20,695 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 22:35:20,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:35:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 22:35:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-06-12 22:35:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 71 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2021-06-12 22:35:20,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 23 [2021-06-12 22:35:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:20,696 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2021-06-12 22:35:20,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2021-06-12 22:35:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:20,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:20,696 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:20,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 22:35:20,897 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1790978285, now seen corresponding path program 70 times [2021-06-12 22:35:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:20,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598788659] [2021-06-12 22:35:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:21,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598788659] [2021-06-12 22:35:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598788659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:21,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93014381] [2021-06-12 22:35:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:21,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:21,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:35:21,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:21,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93014381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:21,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:21,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:35:21,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368444342] [2021-06-12 22:35:21,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:35:21,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:21,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:35:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:21,224 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:21,735 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2021-06-12 22:35:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:35:21,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:21,736 INFO L225 Difference]: With dead ends: 130 [2021-06-12 22:35:21,736 INFO L226 Difference]: Without dead ends: 109 [2021-06-12 22:35:21,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 561.1ms TimeCoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:35:21,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-12 22:35:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2021-06-12 22:35:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.475) internal successors, (118), 80 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 118 transitions. [2021-06-12 22:35:21,737 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 118 transitions. Word has length 23 [2021-06-12 22:35:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:21,737 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 118 transitions. [2021-06-12 22:35:21,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 118 transitions. [2021-06-12 22:35:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:21,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:21,737 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:21,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:21,953 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash -266912117, now seen corresponding path program 71 times [2021-06-12 22:35:21,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:21,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716222885] [2021-06-12 22:35:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:22,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716222885] [2021-06-12 22:35:22,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716222885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250302471] [2021-06-12 22:35:22,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:22,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:35:22,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:35:22,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250302471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:22,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:35:22,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2021-06-12 22:35:22,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536218557] [2021-06-12 22:35:22,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:35:22,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:22,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:35:22,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:35:22,233 INFO L87 Difference]: Start difference. First operand 81 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:22,317 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2021-06-12 22:35:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:35:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:22,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:22,318 INFO L225 Difference]: With dead ends: 88 [2021-06-12 22:35:22,318 INFO L226 Difference]: Without dead ends: 40 [2021-06-12 22:35:22,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:22,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-12 22:35:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-06-12 22:35:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2021-06-12 22:35:22,319 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 23 [2021-06-12 22:35:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:22,319 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2021-06-12 22:35:22,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2021-06-12 22:35:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:35:22,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:22,320 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:22,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 22:35:22,529 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash 516021093, now seen corresponding path program 72 times [2021-06-12 22:35:22,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:22,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058917440] [2021-06-12 22:35:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:22,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:22,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058917440] [2021-06-12 22:35:22,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058917440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:22,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761551467] [2021-06-12 22:35:22,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:22,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:35:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 22:35:22,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 22:35:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761551467] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:22,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:35:22,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 22 [2021-06-12 22:35:22,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850777860] [2021-06-12 22:35:22,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:35:22,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:35:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:22,905 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:22,952 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-06-12 22:35:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:35:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:35:22,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:22,953 INFO L225 Difference]: With dead ends: 38 [2021-06-12 22:35:22,953 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 22:35:22,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 22:35:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 22:35:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 22:35:22,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-06-12 22:35:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:22,953 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 22:35:22,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 22:35:22,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 22:35:23,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 22:35:23,178 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:35:23,180 INFO L202 PluginConnector]: Adding new model easy11.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:35:23 BasicIcfg [2021-06-12 22:35:23,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:35:23,180 INFO L168 Benchmark]: Toolchain (without parser) took 63678.24 ms. Allocated memory was 204.5 MB in the beginning and 404.8 MB in the end (delta: 200.3 MB). Free memory was 183.7 MB in the beginning and 273.5 MB in the end (delta: -89.8 MB). Peak memory consumption was 111.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 204.5 MB. Free memory is still 184.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.15 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 182.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L168 Benchmark]: Boogie Preprocessor took 13.27 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 181.3 MB in the end (delta: 860.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L168 Benchmark]: RCFGBuilder took 201.76 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 171.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L168 Benchmark]: TraceAbstraction took 63436.78 ms. Allocated memory was 204.5 MB in the beginning and 404.8 MB in the end (delta: 200.3 MB). Free memory was 170.9 MB in the beginning and 273.5 MB in the end (delta: -102.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 8.0 GB. [2021-06-12 22:35:23,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 204.5 MB. Free memory is still 184.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.15 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 182.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.27 ms. Allocated memory is still 204.5 MB. Free memory was 182.2 MB in the beginning and 181.3 MB in the end (delta: 860.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 201.76 ms. Allocated memory is still 204.5 MB. Free memory was 181.1 MB in the beginning and 171.2 MB in the end (delta: 9.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 63436.78 ms. Allocated memory was 204.5 MB in the beginning and 404.8 MB in the end (delta: 200.3 MB). Free memory was 170.9 MB in the beginning and 273.5 MB in the end (delta: -102.6 MB). Peak memory consumption was 98.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 63359.1ms, OverallIterations: 104, TraceHistogramMax: 3, EmptinessCheckTime: 61.8ms, AutomataDifference: 25233.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2410 SDtfs, 4556 SDslu, 13147 SDs, 0 SdLazy, 28508 SolverSat, 1587 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10425.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3278 GetRequests, 837 SyntacticMatches, 142 SemanticMatches, 2299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12401 ImplicationChecksByTransitivity, 25824.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=533occurred in iteration=78, InterpolantAutomatonStates: 1578, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 459.1ms AutomataMinimizationTime, 104 MinimizatonAttempts, 4705 StatesRemovedByMinimization, 100 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 152.3ms SsaConstructionTime, 504.2ms SatisfiabilityAnalysisTime, 19413.9ms InterpolantComputationTime, 3387 NumberOfCodeBlocks, 3387 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3208 ConstructedInterpolants, 0 QuantifiedInterpolants, 26694 SizeOfPredicates, 270 NumberOfNonLiveVariables, 2838 ConjunctsInSsa, 1021 ConjunctsInUnsatCore, 179 InterpolantComputations, 39 PerfectInterpolantSequences, 107/455 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...